Sometimes true. Sometimes not. When I decide to buy a book, I check prices on: Amazon (UK,US and sometimes others too) Thriftbooks Abebooks Ali

Sometimes true. Sometimes not. When I decide to buy a book, I check prices on: Amazon (UK,US and sometimes others too) Thriftbooks Abebooks Alibris Wordery Ebay BookDepository BooksPlease At various times, each of these has proven to be carrying the cheapest available copy (including the ones that don't even sell second hand). There have been times when ignoring amazon would have cost me money. Let's check the current prices I am offered this very second on the very last book I bought second hand, "Game Engine Gems II": Amazon UK - GBP 23.97 Amazon US - USD 36.93 Thriftbooks - Out of stock Abebooks UK - 23.98 Abebooks US - USD 56.43 Alibris UK - 37.65 Wordery - 63.99 (new) Ebay UK - 26.67 BookDepository - 42.70 (new) BooksPlease - 58.12 (new) Amazon UK is the cheapest I see (by a penny!), and all those prices are higher than what I paid for it on Amazon UK in the past few weeks. To stick with just Thrift and Abe is to cost oneself money. I do tend to identify, though, the cheapest ever second hand price on Amazon through one of the services that watch for such things, and set an alert when it drifts that low again. With a hundred or so such watches currently active, a couple of times a month I am alerted to a ridiculously low-ball offer on Amazon's second-hand market.