I've had a few deals like that, I must admit. They seem to be getting scarcer though, as people seem to be getting far smarter in researching prices before offering items for sale. In a lot of cases, you can save a few quid on the retail price if you're prepared to wait for an auction to end, but most of the time now I want the item quickly so just hit the 'buy it now' option. A lot of vendors auctions seem to have multiple items all ending up costing practically the same anyway, so even if someone has a dozen identical items for sale, the end prices always seem to get very close to full retail. Still the odd bargain to be had though. Glad you found one
Over the years I've bought lots on eBay, including two Peli-cases that were an absolute steal, several gunslips and sundry other shooting paraphernalia. On top of this I've bought non-shooting related stuff including camera equipment, ipods, books, DVD's, glasses, etc. With only one or two memorable exceptions everything has been easy.
The restriction on buying knives is a pain - of course you can buy kitchen knives, steak knives and letter openers but not pen knives
Certainly there seems to be more competition these days, particularly for items that are easy to search for (rifle scopes from the big three, for example), but there are plenty of bargains still to be had if you do your research and search the Bay accordingly.