Waterstone's Marketplace (UK)

"Waterstone's Marketplace offers an extensive range of used, out-of-print, and hard-to-find books, music, and movies. In partnership with Alibris, Waterstone's offers access to tens of millions of items stocked by independent sellers from 45 countries around the world. Our partnership with Alibris means that you'll notice the Alibris name at various points during your Waterstone's Marketplace experience, including on your credit card statement ("Alibris Waterstone's") if you make a purchase here. You will also need to create a log-in for your Waterstone's Marketplace account that is different from your log-in for Waterstones.com"