Unlocking the Development Diagram (C+)
Ungraded card references. Condition and selling costs affect what you receive; graded slab values are not covered.
Unlocking the Development Diagram (C+) #ST10-014 from Starter Deck 10: Generation Pulse (Holofoil): TCGPlayer US-market reference US$14.05, updated 21 Oct 2026. Source currency: USD.
What does this price mean?
TCGPlayer is a US-market reference in USD. Cardmarket uses a Broad 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 · 26 Jun 2026 – 21 Oct 2026
95 recorded price points. Change compares the first and last points shown.
View recorded prices as a table
| Date | Market price |
|---|---|
| 26 Jun 2026 | $29.99 |
| 27 Jun 2026 | $24.99 |
| 28 Jun 2026 | $23.99 |
| 29 Jun 2026 | $21.99 |
| 30 Jun 2026 | $15.00 |
| 1 Jul 2026 | $15.00 |
| 2 Jul 2026 | $13.25 |
| 3 Jul 2026 | $13.25 |
| 4 Jul 2026 | $12.44 |
| 5 Jul 2026 | $12.92 |
| 6 Jul 2026 | $12.92 |
| 7 Jul 2026 | $12.92 |
| 8 Jul 2026 | $12.92 |
| 9 Jul 2026 | $13.50 |
| 10 Jul 2026 | $13.50 |
| 11 Jul 2026 | $13.50 |
| 12 Jul 2026 | $13.50 |
| 13 Jul 2026 | $13.54 |
| 14 Jul 2026 | $13.69 |
| 15 Jul 2026 | $13.69 |
| 16 Jul 2026 | $13.69 |
| 17 Jul 2026 | $14.05 |
| 18 Jul 2026 | $14.05 |
| 19 Jul 2026 | $14.05 |
| 20 Jul 2026 | $14.35 |
| 21 Jul 2026 | $14.40 |
| 22 Jul 2026 | $14.40 |
| 23 Jul 2026 | $14.41 |
| 24 Jul 2026 | $14.41 |
| 25 Jul 2026 | $14.51 |
| 26 Jul 2026 | $14.62 |
| 27 Jul 2026 | $14.62 |
| 28 Jul 2026 | $14.62 |
| 29 Jul 2026 | $14.58 |
| 30 Jul 2026 | $14.58 |
| 31 Jul 2026 | $14.58 |
| 1 Aug 2026 | $14.82 |
| 2 Aug 2026 | $14.82 |
| 3 Aug 2026 | $14.82 |
| 4 Aug 2026 | $14.82 |
| 5 Aug 2026 | $14.82 |
| 6 Aug 2026 | $14.82 |
| 7 Aug 2026 | $14.82 |
| 8 Aug 2026 | $14.82 |
| 9 Aug 2026 | $15.42 |
| 10 Aug 2026 | $15.42 |
| 11 Aug 2026 | $15.42 |
| 12 Aug 2026 | $15.42 |
| 13 Aug 2026 | $15.24 |
| 14 Aug 2026 | $15.24 |
| 15 Aug 2026 | $15.24 |
| 16 Aug 2026 | $15.24 |
| 17 Aug 2026 | $14.96 |
| 18 Aug 2026 | $14.96 |
| 19 Aug 2026 | $14.96 |
| 20 Aug 2026 | $14.96 |
| 21 Aug 2026 | $14.96 |
| 22 Aug 2026 | $14.96 |
| 23 Aug 2026 | $14.96 |
| 24 Aug 2026 | $15.00 |
| 25 Aug 2026 | $15.00 |
| 26 Aug 2026 | $15.17 |
| 27 Aug 2026 | $15.17 |
| 28 Aug 2026 | $15.17 |
| 29 Aug 2026 | $15.17 |
| 30 Aug 2026 | $15.16 |
| 31 Aug 2026 | $15.06 |
| 1 Sept 2026 | $15.06 |
| 2 Sept 2026 | $15.06 |
| 3 Sept 2026 | $15.06 |
| 4 Sept 2026 | $15.06 |
| 5 Sept 2026 | $15.06 |
| 6 Sept 2026 | $15.06 |
| 7 Sept 2026 | $15.06 |
| 8 Sept 2026 | $15.06 |
| 9 Sept 2026 | $15.06 |
| 10 Sept 2026 | $15.06 |
| 11 Sept 2026 | $15.06 |
| 12 Sept 2026 | $15.06 |
| 13 Sept 2026 | $15.06 |
| 14 Sept 2026 | $15.06 |
| 15 Sept 2026 | $15.06 |
| 17 Sept 2026 | $15.06 |
| 20 Sept 2026 | $15.06 |
| 23 Sept 2026 | $14.65 |
| 26 Sept 2026 | $14.65 |
| 29 Sept 2026 | $14.65 |
| 2 Oct 2026 | $14.65 |
| 5 Oct 2026 | $14.32 |
| 8 Oct 2026 | $14.32 |
| 15 Oct 2026 | $14.05 |
| 16 Oct 2026 | $14.05 |
| 17 Oct 2026 | $14.05 |
| 20 Oct 2026 | $14.05 |
| 21 Oct 2026 | $14.05 |
Sales History
4 sold · all variants(30D)Sales recorded · 18 Sept 2026 – 17 Oct 2026. Sales are grouped into reporting periods; the final date is the latest available data.
Showing Holofoil - Near Mint - English
View recorded sales data
| Date | Units sold | Transactions | Market price | Details |
|---|---|---|---|---|
| 20/09/2026 | 0 | 0 | $15.06 | View sales |
| 23/09/2026 | 1 | 1 | $14.65 | View sales |
| 26/09/2026 | 0 | 0 | $14.65 | View sales |
| 29/09/2026 | 0 | 0 | $14.65 | View sales |
| 02/10/2026 | 0 | 0 | $14.65 | View sales |
| 05/10/2026 | 3 | 3 | $14.32 | View sales |
| 08/10/2026 | 0 | 0 | $14.32 | View sales |
| 11/10/2026 | 0 | 0 | $14.32 | View sales |
| 14/10/2026 | 0 | 0 | $14.32 | View sales |
| 17/10/2026 | 0 | 0 | $14.32 | View sales |
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.