there is far more on here than you would expect. really good deal on the delivery also. £5 is all you pay even if your order comes in more than one delivery. good for new stuff and back catalogue. i use it all the time. tends to be lots cheaper than diverse which i found shafted me on postage.
have used netsounds a few times, it's basically 2nd hand record stores on-line, that's how i found actionrecords. probably more accurate mint/near mint/excellent etc grading than ebay (that kate bush first record was no-way "near mint" !)