| ebay.es | n=8 | £5.37 | +40% |
| ebay.co.uk | n=23 | £5.27 | +37% |
| ebay.de | n=33 | £4.50 | +17% |
| ebay.com | n=128 | £3.84 | — |
How is this value calculated?
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| eigene rohe NM-Verkäufe | 27 | 16 d | £9.76 | 220.41 |
| eigene LP-Verkäufe ÷ 0.779 | 44 | 12 d | £5.92 | 3.14 |
| eigene PSA9-Verkäufe ÷ 9.4997 | 2 | 47 d | £12.86 | 0.71 |
Measured error for this era×language (backtest): ±19 %
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 0.7239 (Sprach-Faktor aus 20 Karten) | 27 | 16 d | £7.06 | 0.96 |
Measured error for this era×language (backtest): ±43 %
Gate not green — shown only here, never as the price.
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 0.4806 (Sprach-Faktor aus 20 Karten) | 27 | 16 d | £4.69 | 0.25 |
Measured error for this era×language (backtest): ±12 %
Gate not green — shown only here, never as the price.
| Evidence path | Sales | Age | Value vᵢ | Weight gᵢ |
|---|---|---|---|---|
| en roh NM × 1.0872 (Sprach-Faktor aus 35 Karten) | 27 | 16 d | £10.60 | 13.47 |
Measured error for this era×language (backtest): ±14 %
Gate not green — shown only here, never as the price.
No PSA numbers for this print yet — in any language.
#XY38
#95 · HR
#98 · HR
#13 · HR
#11 · HR
#XY87
#36 · R
#9 · RH
#5 · R
#12 · RH
#27 · HR
#23 · R
#35 · R
#35 · RFrequently asked questions
What will I get for Swampert EX XY Black Star Promos XY55/211 if I want to sell quickly?
Half of all sales fell between £2.98 and £5.94, with a median of £4.14. Selling fast lands you nearer the lower end; with patience, good photos and a complete title the upper end is achievable.
Below which price is an offer for Swampert EX XY Black Star Promos XY55/211 unrealistic?
The cheapest genuine sales were around £2.19. Offers well below £1.31 are typically fakes, mislabelled cards or a different variant — ask for photos of all four borders and a close-up of the surface.
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.