If you are going by "recent sales" I think both Stockx and GOAT get those numbers from a bunch of different websites. I figured this out because once I saw a BUNCH of lower numbers than what I had paid on a pair and since I was monitoring like 10 consignment websites I could not for the life of me figure out where they were getting those low numbers from. They also don't list shoe condition on those numbers, so for all you know that number could have been from some L.A. based consignment shop with a damaged/no box.
As vino said, be happy with the deal you got and don't look back.