I'd cancel it and buy it for what its worth, but then again I'm not a cnut. Imagine if it was you who f**ked up I'm sure you would want them to be understanding and not a arsehole about it
Lol, its already happened to me before
Buyer wouldn't let me off and left negative feedback
Dont really need the item, would of been on ebay for full price the moment i got it through the post
They did however have something else i was looking for a while now and offered it free of charge, result!