Blastoise

Crystal Guardians · 14/100 ·Rare Holo

Illustration: Kouki Saitou → All Staff Stamp cards →

Staff Stamp £3,616 3 sales Championship Stamp £125.98 20 sales Holo £24.73 502 sales

Market price

£24.73

How is this value calculated?

Ladder estimate · English · ~£24.73 gelb

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
eigene rohe NM-Verkäufe	31	16 d	£24.75	253.06
eigene LP-Verkäufe ÷ 0.7955	45	9 d	£15.12	2.95
eigene PSA8-Verkäufe ÷ 2.2413	16	16 d	£27.20	1.95
eigene PSA7-Verkäufe ÷ 1.361	9	16 d	£28.70	1.57
eigene PSA9-Verkäufe ÷ 4.7767	14	31 d	£35.48	1.51
eigene PSA10-Verkäufe ÷ 42.5003	10	26 d	£76.15	0.2
de roh NM × 1.815 (Sprach-Faktor aus 6 Karten)	3	53 d	£18.55	0.22

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £24.73 · Σ g = 261.46

Measured error for this era×language (backtest): ±22 %

Gate not green — shown only here, never as the price.

Ladder estimate · Deutsch · ~£10.36 rot

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
eigene rohe NM-Verkäufe · Set -11% nachgeführt	3	53 d	£9.50	24.49
eigene LP-Verkäufe ÷ 0.7955	6	35 d	£19.63	2.82
en roh NM × 0.6202 (Sprach-Faktor aus 6 Karten)	31	16 d	£15.36	0.81

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £10.36 · Σ g = 28.12

Measured error for this era×language (backtest): ±20 %

Gate not green — shown only here, never as the price.

Ladder estimate · Français · ~£25.47 rot

Evidence path	Sales	Age	Value vᵢ	Weight gᵢ
en roh NM × 1.0288 (Sprach-Faktor aus 9 Karten)	31	16 d	£25.47	6.34

value = exp( Σ gᵢ·ln vᵢ ⁄ Σ gᵢ ) = £25.47 · Σ g = 6.34

Measured error for this era×language (backtest): ±2 %

Gate not green — shown only here, never as the price.

PSA Population

No PSA numbers for this print yet — in any language.

Recent sales · 3

2026-09-14	EN	PSA 10	2006 Pokemon EX Crystal Guardians CG National Champs Staff B	£4,484
2026-07-12	EN	CGC 9	NEW LISTING2006 Blastoise Ex Crystal Guardians National Cham	£520.75
2026-06-13	EN	PSA 8	Pokemon Blastoise 14/100 EX Crystal Guardians National Champ	£1,309

Frequently asked questions

Is it worth grading Blastoise Crystal Guardians 14/100?

A PSA 10 currently sells for about £4,484, raw the card sits at £24.73 — 181,3× as much. Mathematically, submitting returns £4,484 on average, before fees and shipping. Rule of thumb: submit when the value at a realistic grade is at least double the raw value — which is the case here. Centering decides it: an off-centre card will not get a 10.

How does lastsold determine the market value?

lastsold uses only real sales — eBay plus auction houses like Goldin & Fanatics — recent sales count more (recency weighting), outliers and fakes are removed. It's not an estimate but actual sold prices, separated by condition, language and grading.