I've bought a ton of stuff from eBay, mostly 40k stuff, with very few issues. I will say that from my observations mostly limited to watching 40k auctions, British folks do not "get" eBay. There's a British site that sells second hand warhammer stuff and there will always be like 20 bids on the first day of a 7 day auction, and by the time the auction ends you could have gotten the stuff NIB at that price, or thereabouts.