I sold a lot of mac sims games on ebay for £8.50 + £2 postage. The buyer has contacted me demanding a full refund for the games since I hadn't mentioned that they are incompatible with intel macs. I mean what?! I didn't think I needed to post system requirements or mention that since the sims 1 is a 2000 game, it probably won't work with the latest tech. You get what you buy and she got the games she bought. She said she looked at the system requirements on amazon, but since they were written years and years before intel macs, of course they won't mention if the games will work or not.
You can't buy a copy of Crysis on ebay and demand a refund because it doesn't work with your netbook, on the grounds that it was sold as a PC version!
If she gets paypal involved is it likely that she'll win the case?