There's been a lot of coverage of eBay and businesses that operate using it - I know, I've sold articles to two newspapers on the subject and there have been many more.
It's perhaps inevitable, then, that the company should decide to start advising businesses on what they need to do to trade successfully using the auction site - you can get a PDF of the new eBay guide to small business by clicking here. Refreshingly there's a lot on finances and good business acumen rather than any get-rich-quick ideas, which you might have expected if you'd seen some of the hype from some of the tabloids.