I can sell to you for $250 if you like this unique yellow tang, just let me know
Anyway, the fish are now yours. It’s up to you on how much you want to enjoy or sell the fish. Looks like there is an offer at $125. If you think you can sell for $200-250, great! In the end, buyers beware. I’ve bought stuff that was less-than expected but I was committed. It was on me to inspect and proceed with the sale - nobody forced me. This is no different from buying other merchandises as well.
Good luck.