Is anyone familiar with selling on Ebay? I recently sold a rare toy for several hundred dollars, but the description did not completely match the product and now the customer wants a refund. I already received the money from Paypal and it's already been transferred to my Bank account

My question is, if the seller files for a refund and I don't honor it, I know Ebay will give him his money back. But will they also bill me for the value? Or can I just get away with it and maybe get one "red mark" on my account (which I don't care about too much)