O'Reilly's "hacks" series continues to impress. I've been buying and selling on eBay for nearly two years now, and have already learned a lot. In the few days it took me to read this book I learned as much again and more. Although split into 100 separate "hacks", this book is surprisingly enjoyable to read from cover to cover, and gives a real sense that the author knows what he is writing about.
The book is 1/3 buying advice and 2/3 selling advice. It's way more than just a user manual. As well as eBay itself, it covers a selection of third party tools and web sites which can help you get the best from your eBay transactions. Learning from the sections on "dealing with disappointment" and "keeping out deadbeats", could mean you can avoid those problems yourself. The tips on how and when to use the eBay "feedback" system are golden. There's even some detailed advice (with perl code) about how to use the "eBay API" from your own software.
If you buy or sell more than one or two things on things on eBay in the next year you really should get this book. It will easily pay for itself in saved time, shipping costs, and stress; it will help you win the items you really want, and it can probably get you better prices too. Go buy it.