I hope it’s okay to ask here, if not please remove!

I have a pair of LEGO x Racer TR Little Kid ‘Black Equipment Yellow’ in size 13.5

I don’t know anything about reselling sneakers. I bought them as a gift, they didn’t fit and I passed the return window. I was going to put them up for like $50 but when I googled them, GOAT and Fight club list them for $2,400 which is insane to me lol. Is that just the amount 1 seller is listing them for? I saw 2 listings on eBay for $50.

How accurate are those websites? What’s it based off of? Am I misunderstanding something? Lol How do I figure out what shoes are really worth?

Thanks in advance!