Figures from this source
- FiledSale price 1st Ed Base Charizard #4 PSA 10, Heritage Auction #7431 lot 36081 (incl. buyer's premium), 12 December 2025$550,000
- FiledHeritage buyer's premium rate, Auction #7431, 12 December 2025/1325 percent of successful bid
- FiledPSA 10 population, 1st Ed Base Charizard #4 (as stated in lot description), as of lot description, Dec 2025125 copies
- FiledBids plus registered phone bidders, Heritage lot 7431-36081, 12 December 202554 count