How much is a PSA 10 Mew ex #347 worth?
The PSA 10 Mew ex #347 from Shiny Treasure ex (Japanese) has a median market value of $935, with recent sales ranging $438 to $1,500 — based on 164 recent graded sales.
Is a PSA 10 Mew ex #347 worth more than ungraded?
Yes. A PSA 10 copy has a median value of $935 versus about $382 ungraded — roughly a 2.4× 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.