I've sold several on there but never bought one. I've only had one problem where a buyer said the item didn't match the description because of a dent in the casing. It transpired that he browsed the listing using eBay Mobile which doesn't show the item condition for some reason. If you look using a desktop browser you'll see a big yellow box where you can add all the details which I had done. The buyer withdrew his case afterwards.
The lesson? NEVER USE EBAY MOBILE TO BID FOR ITEMS.