Not sure really, I pick up older shirts when I get the chance, or get offered them, and compare them with the ones I already have, then I choose which to keep, and which to and sell on. I'll be happy with whatever it sells for, and someone will get a cracking addition to their Albion collection.
Use the eBay resolution centre, they 99% always side with the buyer in these cases. The seller will have the money taken from his account and paid to yours. Ignore the threats.