I bought a book from one of AbeBooks' sellers and then a companion book from another of their sellers, paying double the market price of the book by the time shipping was included. I got a message the next day that the out of print book wasn't actually available. AbeBooks customer service has been atrocious with them making no substantive effort to fix their problem. The last round of emails from their CSRs are openly taunting. Now I don't have the book I wanted, paid double the market rate for a companion book and have wasted a week of my life trying to get this company to meet their obligation. Awful, just awful.