I've had a couple of real bargains.... neither on ebay though.... just when GW pulled the plug a chap on warseer offered me a box of eldar, asked £60 for it, so it wasn't super cheap but when he sent me pics there must have been £4-500 worth in there.... 25 metal falcons, titans, 13 superheavies, vampires, nightwings and just so much stuff I just about tore his arm off.... the second was a guy who had listed a marine army on ebay, I lamented that I would have bought some stuff before he listed it and he offered to pull the auction for me, got about 5000 points of latest edition marine stuff for £55....