How much is a ACE 10 Mew ex #205 worth?
The ACE 10 Mew ex #205 from Pokemon 151 (Japanese) has a median market value of $349, with recent sales ranging $290 to $354 — based on 5 recent graded sales.
Is a ACE 10 Mew ex #205 worth more than ungraded?
Yes. A ACE 10 copy has a median value of $349 versus about $202 ungraded — roughly a 1.7× premium for the ACE 10 grade.
Where do PokéTT's ACE 10 prices come from?
PokéTT tracks real graded sales across eBay, Yahoo Auctions and Mercari, then shows the median within the ACE 10 grade — not a single outlier sale — so the mark reflects the true market.