My advice would be to open eBay's dispute procedures as soon as something goes wrong. If the item does eventually turn up and is OK , then you can apologise (profusely ?) to the seller. eBay keeps your payment in a form of escrow - if it has released payment to the seller it's a case of tough luck !!
EBAY MONEY BACK.......WHAT A JOKE ???
Well I never received my item, sent over twenty e-mails to ebay....waited 14 days and not one nickle has come my way.......I talked with a very nice, heavily accented person in another country, could not understand him, and I read every document that e-bay can print to deceive a buyer into thinking something is being done........And I have received nothing but a head ache.......So the buyer should be ware........Its not as it appears on the internet