I've seen a laptop on Gumtree that I'm interested in. It's about £300 off list price and the guy selling says he gets them from an importer and that he has 3 of them. Working on the basis that its all kosher stuff, where would I stand on warranty? He says there is a warranty card inside but I assume thats just for the international warranty. There would be no invoice from his supplier to him and I doubt if he would give me one! Any advice gratefully received.