Mewtwo

A PSA 9 English Mewtwo (XY Black Star Promos XY100/211) is worth about €521 (≈ $581), based on 8 sales in the last 12 months, blended with an estimate from PSA 8 (10 PSA 8 sales); most sales fall between €426 and €697. A PSA 8 English Mewtwo (XY Black Star Promos XY100/211) is worth about €99.27 (≈ $111), based on 10 sales in the last 12 months, blended with an estimate from PSA 9 (7 PSA 9 sales); most sales fall between €60.22 and €151.

EverySlab recomputes the Mewtwo fair values every day, most recently on Oct 28, 2026. Each grade and language gets a median of completed sales from the last 12 months on eBay, Fanatics Collect and Goldin, with older sales adjusted to today's market and recent sales counting more; thinly traded grades are estimated from related grades and languages. How fair value works

None sold on EU venues in the last 90 days (4 copies on all venues), so there is no EU pace to time a sale from. Listed at €521, one copy nets about €474 on Cardmarket after fees.