Cool Classmate, Sakura-chan
TCGPlayer · US market · NormalUS$0.43USD market referenceUpdated 22 Oct 2026
Cardmarket · European market—Non-foil guide · EUR source · converted from EUR to USD
▼98.57%historical change
Ungraded card references. Condition and selling costs affect what you receive; graded slab values are not covered.
Cool Classmate, Sakura-chan #DZ-SS05/018EN from DZ-SS05: CoroCoro Start Deck Pack (Normal): TCGPlayer US-market reference US$0.43, updated 22 Oct 2026. Source currency: USD.
What does this price mean?
TCGPlayer is a US-market reference in USD. Cardmarket uses a Non-foil guide · EUR source, converted from EUR to USD; it is not UK-only pricing. Prices refer to the displayed printing. Your card's condition, language, grading and selling costs can affect what you receive.
US market price history · 27 May 2025 – 23 Oct 2026
492 recorded price points. Change compares the first and last points shown.
View recorded prices as a table
| Date | Market price |
|---|---|
| 27 May 2025 | $29.99 |
| 28 May 2025 | $11.97 |
| 29 May 2025 | $7.49 |
| 30 May 2025 | $4.74 |
| 31 May 2025 | $4.74 |
| 1 Jun 2025 | $4.45 |
| 2 Jun 2025 | $4.45 |
| 3 Jun 2025 | $4.49 |
| 4 Jun 2025 | $4.49 |
| 5 Jun 2025 | $4.28 |
| 6 Jun 2025 | $3.99 |
| 7 Jun 2025 | $3.82 |
| 8 Jun 2025 | $3.83 |
| 9 Jun 2025 | $3.78 |
| 10 Jun 2025 | $3.72 |
| 11 Jun 2025 | $3.72 |
| 12 Jun 2025 | $3.66 |
| 13 Jun 2025 | $3.66 |
| 14 Jun 2025 | $3.66 |
| 15 Jun 2025 | $3.66 |
| 16 Jun 2025 | $3.66 |
| 17 Jun 2025 | $3.66 |
| 18 Jun 2025 | $3.66 |
| 19 Jun 2025 | $3.61 |
| 20 Jun 2025 | $3.61 |
| 21 Jun 2025 | $3.61 |
| 22 Jun 2025 | $3.61 |
| 23 Jun 2025 | $3.61 |
| 24 Jun 2025 | $3.53 |
| 25 Jun 2025 | $3.61 |
| 26 Jun 2025 | $3.61 |
| 27 Jun 2025 | $3.61 |
| 28 Jun 2025 | $3.52 |
| 29 Jun 2025 | $3.52 |
| 30 Jun 2025 | $3.52 |
| 1 Jul 2025 | $3.52 |
| 2 Jul 2025 | $3.52 |
| 3 Jul 2025 | $3.52 |
| 4 Jul 2025 | $3.31 |
| 5 Jul 2025 | $3.31 |
| 6 Jul 2025 | $3.31 |
| 7 Jul 2025 | $3.31 |
| 8 Jul 2025 | $3.31 |
| 9 Jul 2025 | $3.31 |
| 10 Jul 2025 | $3.18 |
| 11 Jul 2025 | $3.18 |
| 12 Jul 2025 | $3.18 |
| 13 Jul 2025 | $3.06 |
| 14 Jul 2025 | $3.06 |
| 15 Jul 2025 | $3.06 |
| 16 Jul 2025 | $3.06 |
| 17 Jul 2025 | $3.06 |
| 18 Jul 2025 | $3.06 |
| 19 Jul 2025 | $3.06 |
| 20 Jul 2025 | $3.06 |
| 21 Jul 2025 | $3.06 |
| 22 Jul 2025 | $3.06 |
| 23 Jul 2025 | $3.06 |
| 24 Jul 2025 | $3.06 |
| 25 Jul 2025 | $3.06 |
| 26 Jul 2025 | $3.06 |
| 27 Jul 2025 | $2.94 |
| 28 Jul 2025 | $2.83 |
| 29 Jul 2025 | $2.83 |
| 30 Jul 2025 | $2.83 |
| 31 Jul 2025 | $2.83 |
| 1 Aug 2025 | $2.83 |
| 2 Aug 2025 | $2.73 |
| 3 Aug 2025 | $2.73 |
| 4 Aug 2025 | $2.73 |
| 5 Aug 2025 | $2.73 |
| 6 Aug 2025 | $2.73 |
| 7 Aug 2025 | $2.73 |
| 8 Aug 2025 | $2.64 |
| 9 Aug 2025 | $2.47 |
| 10 Aug 2025 | $2.32 |
| 11 Aug 2025 | $2.15 |
| 12 Aug 2025 | $2.15 |
| 13 Aug 2025 | $1.90 |
| 14 Aug 2025 | $1.80 |
| 15 Aug 2025 | $1.80 |
| 16 Aug 2025 | $1.69 |
| 17 Aug 2025 | $1.69 |
| 18 Aug 2025 | $1.59 |
| 19 Aug 2025 | $1.59 |
| 20 Aug 2025 | $1.50 |
| 21 Aug 2025 | $1.50 |
| 22 Aug 2025 | $1.50 |
| 23 Aug 2025 | $1.50 |
| 24 Aug 2025 | $1.50 |
| 25 Aug 2025 | $1.50 |
| 26 Aug 2025 | $1.20 |
| 27 Aug 2025 | $1.20 |
| 28 Aug 2025 | $1.20 |
| 29 Aug 2025 | $1.20 |
| 30 Aug 2025 | $1.20 |
| 31 Aug 2025 | $1.20 |
| 1 Sept 2025 | $1.20 |
| 2 Sept 2025 | $1.20 |
| 3 Sept 2025 | $1.06 |
| 4 Sept 2025 | $1.06 |
| 5 Sept 2025 | $1.06 |
| 6 Sept 2025 | $0.96 |
| 7 Sept 2025 | $0.96 |
| 8 Sept 2025 | $0.96 |
| 9 Sept 2025 | $0.76 |
| 10 Sept 2025 | $0.76 |
| 11 Sept 2025 | $0.66 |
| 12 Sept 2025 | $0.66 |
| 13 Sept 2025 | $0.66 |
| 14 Sept 2025 | $0.66 |
| 15 Sept 2025 | $0.66 |
| 16 Sept 2025 | $0.66 |
| 17 Sept 2025 | $0.66 |
| 18 Sept 2025 | $0.66 |
| 19 Sept 2025 | $0.66 |
| 20 Sept 2025 | $0.66 |
| 21 Sept 2025 | $0.66 |
| 22 Sept 2025 | $0.66 |
| 23 Sept 2025 | $0.66 |
| 24 Sept 2025 | $0.66 |
| 25 Sept 2025 | $0.66 |
| 26 Sept 2025 | $0.66 |
| 27 Sept 2025 | $0.66 |
| 28 Sept 2025 | $0.66 |
| 29 Sept 2025 | $0.62 |
| 30 Sept 2025 | $0.62 |
| 1 Oct 2025 | $0.56 |
| 2 Oct 2025 | $0.56 |
| 3 Oct 2025 | $0.56 |
| 4 Oct 2025 | $0.56 |
| 5 Oct 2025 | $0.56 |
| 6 Oct 2025 | $0.56 |
| 7 Oct 2025 | $0.56 |
| 8 Oct 2025 | $0.56 |
| 9 Oct 2025 | $0.56 |
| 10 Oct 2025 | $0.56 |
| 11 Oct 2025 | $0.56 |
| 12 Oct 2025 | $0.56 |
| 13 Oct 2025 | $0.56 |
| 14 Oct 2025 | $0.56 |
| 15 Oct 2025 | $0.56 |
| 16 Oct 2025 | $0.56 |
| 17 Oct 2025 | $0.56 |
| 18 Oct 2025 | $0.56 |
| 19 Oct 2025 | $0.56 |
| 20 Oct 2025 | $0.56 |
| 21 Oct 2025 | $0.56 |
| 22 Oct 2025 | $0.56 |
| 23 Oct 2025 | $0.56 |
| 24 Oct 2025 | $0.56 |
| 25 Oct 2025 | $0.56 |
| 26 Oct 2025 | $0.56 |
| 27 Oct 2025 | $0.58 |
| 28 Oct 2025 | $0.58 |
| 29 Oct 2025 | $0.58 |
| 30 Oct 2025 | $0.58 |
| 31 Oct 2025 | $0.58 |
| 1 Nov 2025 | $0.58 |
| 2 Nov 2025 | $0.58 |
| 3 Nov 2025 | $0.58 |
| 4 Nov 2025 | $0.58 |
| 5 Nov 2025 | $0.58 |
| 6 Nov 2025 | $0.58 |
| 7 Nov 2025 | $0.58 |
| 8 Nov 2025 | $0.58 |
| 9 Nov 2025 | $0.58 |
| 10 Nov 2025 | $0.58 |
| 11 Nov 2025 | $0.58 |
| 12 Nov 2025 | $0.58 |
| 13 Nov 2025 | $0.58 |
| 14 Nov 2025 | $0.58 |
| 15 Nov 2025 | $0.58 |
| 16 Nov 2025 | $0.58 |
| 17 Nov 2025 | $0.58 |
| 18 Nov 2025 | $0.58 |
| 19 Nov 2025 | $0.58 |
| 20 Nov 2025 | $0.58 |
| 21 Nov 2025 | $0.58 |
| 22 Nov 2025 | $0.58 |
| 23 Nov 2025 | $0.58 |
| 24 Nov 2025 | $0.58 |
| 25 Nov 2025 | $0.58 |
| 26 Nov 2025 | $0.58 |
| 27 Nov 2025 | $0.58 |
| 28 Nov 2025 | $0.58 |
| 29 Nov 2025 | $0.58 |
| 30 Nov 2025 | $0.58 |
| 1 Dec 2025 | $0.58 |
| 2 Dec 2025 | $0.58 |
| 3 Dec 2025 | $0.58 |
| 4 Dec 2025 | $0.58 |
| 5 Dec 2025 | $0.58 |
| 6 Dec 2025 | $0.58 |
| 7 Dec 2025 | $0.58 |
| 8 Dec 2025 | $0.58 |
| 9 Dec 2025 | $0.58 |
| 10 Dec 2025 | $0.58 |
| 11 Dec 2025 | $0.58 |
| 12 Dec 2025 | $0.58 |
| 13 Dec 2025 | $0.58 |
| 14 Dec 2025 | $0.58 |
| 15 Dec 2025 | $0.58 |
| 16 Dec 2025 | $0.58 |
| 17 Dec 2025 | $0.58 |
| 18 Dec 2025 | $0.58 |
| 19 Dec 2025 | $0.58 |
| 20 Dec 2025 | $0.59 |
| 21 Dec 2025 | $0.59 |
| 22 Dec 2025 | $0.59 |
| 23 Dec 2025 | $0.59 |
| 24 Dec 2025 | $0.59 |
| 25 Dec 2025 | $0.59 |
| 26 Dec 2025 | $0.59 |
| 27 Dec 2025 | $0.59 |
| 28 Dec 2025 | $0.59 |
| 29 Dec 2025 | $0.59 |
| 30 Dec 2025 | $0.59 |
| 31 Dec 2025 | $0.59 |
| 1 Jan 2026 | $0.59 |
| 2 Jan 2026 | $0.59 |
| 3 Jan 2026 | $0.59 |
| 4 Jan 2026 | $0.59 |
| 5 Jan 2026 | $0.59 |
| 6 Jan 2026 | $0.59 |
| 7 Jan 2026 | $0.59 |
| 8 Jan 2026 | $0.59 |
| 9 Jan 2026 | $0.59 |
| 10 Jan 2026 | $0.59 |
| 11 Jan 2026 | $0.59 |
| 12 Jan 2026 | $0.59 |
| 13 Jan 2026 | $0.59 |
| 14 Jan 2026 | $0.59 |
| 15 Jan 2026 | $0.59 |
| 16 Jan 2026 | $0.59 |
| 17 Jan 2026 | $0.59 |
| 18 Jan 2026 | $0.59 |
| 19 Jan 2026 | $0.59 |
| 20 Jan 2026 | $0.59 |
| 21 Jan 2026 | $0.59 |
| 22 Jan 2026 | $0.59 |
| 23 Jan 2026 | $0.59 |
| 24 Jan 2026 | $0.59 |
| 25 Jan 2026 | $0.59 |
| 26 Jan 2026 | $0.59 |
| 27 Jan 2026 | $0.59 |
| 28 Jan 2026 | $0.59 |
| 29 Jan 2026 | $0.59 |
| 30 Jan 2026 | $0.59 |
| 31 Jan 2026 | $0.59 |
| 1 Feb 2026 | $0.59 |
| 2 Feb 2026 | $0.59 |
| 3 Feb 2026 | $0.59 |
| 4 Feb 2026 | $0.59 |
| 5 Feb 2026 | $0.59 |
| 6 Feb 2026 | $0.58 |
| 7 Feb 2026 | $0.58 |
| 8 Feb 2026 | $0.58 |
| 9 Feb 2026 | $0.56 |
| 10 Feb 2026 | $0.57 |
| 11 Feb 2026 | $0.57 |
| 12 Feb 2026 | $0.58 |
| 13 Feb 2026 | $0.58 |
| 14 Feb 2026 | $0.59 |
| 15 Feb 2026 | $0.59 |
| 16 Feb 2026 | $0.60 |
| 17 Feb 2026 | $0.60 |
| 18 Feb 2026 | $0.60 |
| 19 Feb 2026 | $0.60 |
| 20 Feb 2026 | $0.60 |
| 21 Feb 2026 | $0.60 |
| 22 Feb 2026 | $0.60 |
| 23 Feb 2026 | $0.62 |
| 24 Feb 2026 | $0.62 |
| 25 Feb 2026 | $0.62 |
| 26 Feb 2026 | $0.62 |
| 27 Feb 2026 | $0.62 |
| 28 Feb 2026 | $0.62 |
| 1 Mar 2026 | $0.62 |
| 2 Mar 2026 | $0.62 |
| 3 Mar 2026 | $0.63 |
| 4 Mar 2026 | $0.63 |
| 5 Mar 2026 | $0.65 |
| 6 Mar 2026 | $0.67 |
| 7 Mar 2026 | $0.67 |
| 8 Mar 2026 | $0.68 |
| 9 Mar 2026 | $0.67 |
| 10 Mar 2026 | $0.69 |
| 11 Mar 2026 | $0.69 |
| 12 Mar 2026 | $0.69 |
| 13 Mar 2026 | $0.69 |
| 14 Mar 2026 | $0.69 |
| 15 Mar 2026 | $0.69 |
| 16 Mar 2026 | $0.69 |
| 17 Mar 2026 | $0.69 |
| 18 Mar 2026 | $0.69 |
| 19 Mar 2026 | $0.69 |
| 20 Mar 2026 | $0.69 |
| 21 Mar 2026 | $0.69 |
| 22 Mar 2026 | $0.69 |
| 23 Mar 2026 | $0.69 |
| 24 Mar 2026 | $0.69 |
| 25 Mar 2026 | $0.69 |
| 26 Mar 2026 | $0.69 |
| 27 Mar 2026 | $0.69 |
| 28 Mar 2026 | $0.69 |
| 29 Mar 2026 | $0.66 |
| 30 Mar 2026 | $0.66 |
| 31 Mar 2026 | $0.69 |
| 1 Apr 2026 | $0.63 |
| 2 Apr 2026 | $0.63 |
| 3 Apr 2026 | $0.63 |
| 4 Apr 2026 | $0.63 |
| 5 Apr 2026 | $0.63 |
| 6 Apr 2026 | $0.63 |
| 7 Apr 2026 | $0.63 |
| 8 Apr 2026 | $0.63 |
| 9 Apr 2026 | $0.63 |
| 10 Apr 2026 | $0.63 |
| 11 Apr 2026 | $0.63 |
| 12 Apr 2026 | $0.63 |
| 13 Apr 2026 | $0.63 |
| 14 Apr 2026 | $0.59 |
| 15 Apr 2026 | $0.59 |
| 16 Apr 2026 | $0.59 |
| 17 Apr 2026 | $0.59 |
| 18 Apr 2026 | $0.59 |
| 19 Apr 2026 | $0.59 |
| 20 Apr 2026 | $0.56 |
| 21 Apr 2026 | $0.56 |
| 22 Apr 2026 | $0.56 |
| 23 Apr 2026 | $0.56 |
| 24 Apr 2026 | $0.56 |
| 25 Apr 2026 | $0.52 |
| 26 Apr 2026 | $0.52 |
| 27 Apr 2026 | $0.52 |
| 28 Apr 2026 | $0.52 |
| 29 Apr 2026 | $0.52 |
| 30 Apr 2026 | $0.52 |
| 1 May 2026 | $0.52 |
| 2 May 2026 | $0.52 |
| 3 May 2026 | $0.52 |
| 4 May 2026 | $0.52 |
| 5 May 2026 | $0.52 |
| 6 May 2026 | $0.52 |
| 7 May 2026 | $0.52 |
| 8 May 2026 | $0.52 |
| 9 May 2026 | $0.52 |
| 10 May 2026 | $0.52 |
| 11 May 2026 | $0.52 |
| 12 May 2026 | $0.52 |
| 13 May 2026 | $0.52 |
| 14 May 2026 | $0.52 |
| 15 May 2026 | $0.52 |
| 16 May 2026 | $0.52 |
| 17 May 2026 | $0.52 |
| 18 May 2026 | $0.52 |
| 19 May 2026 | $0.52 |
| 20 May 2026 | $0.49 |
| 21 May 2026 | $0.49 |
| 22 May 2026 | $0.49 |
| 23 May 2026 | $0.49 |
| 24 May 2026 | $0.49 |
| 25 May 2026 | $0.49 |
| 26 May 2026 | $0.49 |
| 27 May 2026 | $0.49 |
| 28 May 2026 | $0.49 |
| 29 May 2026 | $0.49 |
| 30 May 2026 | $0.49 |
| 31 May 2026 | $0.49 |
| 1 Jun 2026 | $0.49 |
| 2 Jun 2026 | $0.49 |
| 3 Jun 2026 | $0.49 |
| 4 Jun 2026 | $0.49 |
| 5 Jun 2026 | $0.49 |
| 6 Jun 2026 | $0.49 |
| 7 Jun 2026 | $0.49 |
| 8 Jun 2026 | $0.49 |
| 9 Jun 2026 | $0.49 |
| 10 Jun 2026 | $0.49 |
| 11 Jun 2026 | $0.49 |
| 12 Jun 2026 | $0.49 |
| 13 Jun 2026 | $0.49 |
| 14 Jun 2026 | $0.49 |
| 15 Jun 2026 | $0.49 |
| 16 Jun 2026 | $0.49 |
| 17 Jun 2026 | $0.49 |
| 18 Jun 2026 | $0.45 |
| 19 Jun 2026 | $0.45 |
| 20 Jun 2026 | $0.45 |
| 21 Jun 2026 | $0.45 |
| 22 Jun 2026 | $0.45 |
| 23 Jun 2026 | $0.45 |
| 24 Jun 2026 | $0.45 |
| 25 Jun 2026 | $0.45 |
| 26 Jun 2026 | $0.45 |
| 27 Jun 2026 | $0.45 |
| 28 Jun 2026 | $0.45 |
| 29 Jun 2026 | $0.45 |
| 30 Jun 2026 | $0.45 |
| 1 Jul 2026 | $0.45 |
| 2 Jul 2026 | $0.45 |
| 3 Jul 2026 | $0.45 |
| 4 Jul 2026 | $0.45 |
| 5 Jul 2026 | $0.45 |
| 6 Jul 2026 | $0.45 |
| 7 Jul 2026 | $0.45 |
| 8 Jul 2026 | $0.45 |
| 9 Jul 2026 | $0.45 |
| 10 Jul 2026 | $0.45 |
| 11 Jul 2026 | $0.45 |
| 12 Jul 2026 | $0.45 |
| 13 Jul 2026 | $0.45 |
| 14 Jul 2026 | $0.45 |
| 15 Jul 2026 | $0.45 |
| 16 Jul 2026 | $0.45 |
| 17 Jul 2026 | $0.45 |
| 18 Jul 2026 | $0.45 |
| 19 Jul 2026 | $0.45 |
| 20 Jul 2026 | $0.45 |
| 21 Jul 2026 | $0.45 |
| 22 Jul 2026 | $0.45 |
| 23 Jul 2026 | $0.45 |
| 24 Jul 2026 | $0.45 |
| 25 Jul 2026 | $0.45 |
| 26 Jul 2026 | $0.45 |
| 27 Jul 2026 | $0.45 |
| 28 Jul 2026 | $0.45 |
| 29 Jul 2026 | $0.45 |
| 30 Jul 2026 | $0.45 |
| 31 Jul 2026 | $0.45 |
| 1 Aug 2026 | $0.45 |
| 2 Aug 2026 | $0.45 |
| 3 Aug 2026 | $0.45 |
| 4 Aug 2026 | $0.45 |
| 5 Aug 2026 | $0.45 |
| 6 Aug 2026 | $0.45 |
| 7 Aug 2026 | $0.45 |
| 8 Aug 2026 | $0.45 |
| 9 Aug 2026 | $0.45 |
| 10 Aug 2026 | $0.45 |
| 11 Aug 2026 | $0.45 |
| 12 Aug 2026 | $0.45 |
| 13 Aug 2026 | $0.45 |
| 14 Aug 2026 | $0.45 |
| 15 Aug 2026 | $0.45 |
| 16 Aug 2026 | $0.45 |
| 17 Aug 2026 | $0.45 |
| 18 Aug 2026 | $0.45 |
| 19 Aug 2026 | $0.44 |
| 20 Aug 2026 | $0.44 |
| 21 Aug 2026 | $0.44 |
| 22 Aug 2026 | $0.44 |
| 23 Aug 2026 | $0.44 |
| 24 Aug 2026 | $0.44 |
| 25 Aug 2026 | $0.44 |
| 26 Aug 2026 | $0.44 |
| 27 Aug 2026 | $0.44 |
| 28 Aug 2026 | $0.44 |
| 29 Aug 2026 | $0.44 |
| 30 Aug 2026 | $0.44 |
| 31 Aug 2026 | $0.44 |
| 1 Sept 2026 | $0.44 |
| 2 Sept 2026 | $0.44 |
| 3 Sept 2026 | $0.44 |
| 4 Sept 2026 | $0.44 |
| 5 Sept 2026 | $0.44 |
| 6 Sept 2026 | $0.44 |
| 7 Sept 2026 | $0.44 |
| 8 Sept 2026 | $0.44 |
| 9 Sept 2026 | $0.44 |
| 10 Sept 2026 | $0.44 |
| 11 Sept 2026 | $0.44 |
| 12 Sept 2026 | $0.44 |
| 13 Sept 2026 | $0.44 |
| 14 Sept 2026 | $0.44 |
| 15 Sept 2026 | $0.44 |
| 16 Sept 2026 | $0.44 |
| 19 Sept 2026 | $0.44 |
| 22 Sept 2026 | $0.44 |
| 25 Sept 2026 | $0.44 |
| 28 Sept 2026 | $0.43 |
| 1 Oct 2026 | $0.43 |
| 4 Oct 2026 | $0.43 |
| 7 Oct 2026 | $0.43 |
| 10 Oct 2026 | $0.43 |
| 15 Oct 2026 | $0.43 |
| 16 Oct 2026 | $0.43 |
| 17 Oct 2026 | $0.43 |
| 20 Oct 2026 | $0.43 |
| 21 Oct 2026 | $0.43 |
| 23 Oct 2026 | $0.43 |
Period high$29.99
Period low$0.43
Period average$1.12
Recorded points492
Sales History
12 sold · all variants(30D)Sales recorded · 19 Sept 2026 – 18 Oct 2026. Sales are grouped into reporting periods; the final date is the latest available data.
Showing Normal - Near Mint - English
Click a bar to view full breakdown
View recorded sales data
| Date | Units sold | Transactions | Market price | Details |
|---|---|---|---|---|
| 21/09/2026 | 0 | 0 | $0.44 | View sales |
| 24/09/2026 | 4 | 1 | $0.44 | View sales |
| 27/09/2026 | 0 | 0 | $0.43 | View sales |
| 30/09/2026 | 0 | 0 | $0.43 | View sales |
| 03/10/2026 | 0 | 0 | $0.43 | View sales |
| 06/10/2026 | 0 | 0 | $0.43 | View sales |
| 09/10/2026 | 0 | 0 | $0.43 | View sales |
| 12/10/2026 | 8 | 1 | $0.43 | View sales |
| 15/10/2026 | 0 | 0 | $0.43 | View sales |
| 18/10/2026 | 0 | 0 | $0.43 | View sales |
12Units sold · selected condition
2Transactions · selected condition
$0.43Average recorded market price
$0.44Lowest Sale
$0.44Highest Sale
Average recorded market price is the simple mean of reporting periods with a positive market price; it is not weighted by sales volume. A dash means no usable observation is available.