How much is a PSA 10 Eevee #189 worth?
The PSA 10 Eevee #189 from BW-P Promotional Cards (Japanese) has a median market value of $144, with recent sales ranging $41.32 to $1,625 — based on 50 recent graded sales.
Is a PSA 10 Eevee #189 worth more than ungraded?
Yes. A PSA 10 copy has a median value of $144 versus about $106 ungraded — roughly a 1.4× premium for the PSA 10 grade.
Where do PokéTT's PSA 10 prices come from?
PokéTT tracks real graded sales across eBay, Yahoo Auctions and Mercari, then shows the median within the PSA 10 grade — not a single outlier sale — so the mark reflects the true market.