How much is a BGS 8 Erika's Venusaur #4 worth?
The BGS 8 Erika's Venusaur #4 from Gym Challenge (English) has a median market value of $286, with recent sales ranging $266 to $305 — based on 2 recent graded sales.
Is a BGS 8 Erika's Venusaur #4 worth more than ungraded?
Yes. A BGS 8 copy has a median value of $286 versus about $250 ungraded — roughly a 1.1× premium for the BGS 8 grade.
Where do PokéTT's BGS 8 prices come from?
PokéTT tracks real graded sales across eBay, Yahoo Auctions and Mercari, then shows the median within the BGS 8 grade — not a single outlier sale — so the mark reflects the true market.