How much is a PSA 6 Rocket's Mewtwo #14 worth?
The PSA 6 Rocket's Mewtwo #14 from Gym Challenge (English) has a median market value of $170, with recent sales ranging $170 to $170 — based on 1 recent graded sale.
Is a PSA 6 Rocket's Mewtwo #14 worth more than ungraded?
Yes. A PSA 6 copy has a median value of $170 versus about $180 ungraded — roughly a 0.9× premium for the PSA 6 grade.
Where do PokéTT's PSA 6 prices come from?
PokéTT tracks real graded sales across eBay, Yahoo Auctions and Mercari, then shows the median within the PSA 6 grade — not a single outlier sale — so the mark reflects the true market.