I sold an item a while back, good in used condition. It was hardly used and was clean etc... the winning bidder didn't ask any questions before the bid. After the bid the buyer started asking lots of questions and then refused to pay as they said the item was an older version of the one they wanted and they only bought it for a friend and didn't want it anymore no hard feelings etc.... To be honest, I didn't even know there were versions for this. I tried to explain that this was not acceptable and they never replied and I didn't hear from them anymore. I opened a case and after three weeks, the buyer paid (probably to avoid their account being suspended?). I sent the item well packaged the next day and it arrived very promptly. As soon as the buyer received it, they started arguing that item isn't as described (it was), that is is filthy and full of mud etc.. (it wasn't!), rusty etc....
What do I do now? I know they are only saying this so that they can get a refund and give me negative feedback because I opened an "unpaid item case"). I am going to get stuffed won't I. I am really upset by this as I have 100% feedback and I only sell items in a very good condition. They buyer accused me of lying etc...
Any suggestions?