How much is a CGC 10 Giovanni's Machamp #6 worth?
The CGC 10 Giovanni's Machamp #6 from Gym Challenge (English) has a median market value of $528, with recent sales ranging $408 to $610 — based on 3 recent graded sales.
Is a CGC 10 Giovanni's Machamp #6 worth more than ungraded?
Yes. A CGC 10 copy has a median value of $528 versus about $105 ungraded — roughly a 5.0× premium for the CGC 10 grade.
Where do PokéTT's CGC 10 prices come from?
PokéTT tracks real graded sales across eBay, Yahoo Auctions and Mercari, then shows the median within the CGC 10 grade — not a single outlier sale — so the mark reflects the true market.