This website is very similar to what I'm trying to create. Source: almost 3 years ago

Plugd | Founding Product Designer | Remote (US or Asia) | https://getplugd.com Plugd is like Reddit built for commerce, making community-generated content discoverable and shoppable. It's getting hard to find trustworthy content online, especially when it comes to products. But small, niche communities, like the ones on Reddit are one of the few places you can still find it. Plugd is solving this problem, while... - Source: Hacker News / about 3 years ago

Have you not searched for used book sites? There are so many and you can definitely get the size of paperback you want at usually good prices. Eg betterworldbooks.com wob.com, abebooks.com etc etc. Source: 7 months ago

New Directions for Strings Teacher's Manual Book 2 [Soft Cover ] ($29.75 on abebooks.com because on Amazon it was like $40 something I think). Source: 10 months ago

Hi - my 2 primary sites to find publications are amazon.com and abebooks.com. I've found used copies of reference books on both sites. Since I collect Australia, I also watch the Australian auction site. I've found some great books in auctions. Of course, the shipping sometimes is more than the book. I also use eBay, but for some reason, the publications I look for are not as commonly found there. Source: 11 months ago

Found an old hardcover 1980 edition of this on abebooks.com ran me just under $15 total shipped from Germany! I'm mainly interested in better info on the 1800's coins, which I'm guessing was pretty well sorted by 1980, so should still be a good extra resource to have. Source: 11 months ago

A lot of my money's gone to abebooks.com now that I can stay focussed all the way through a book. Source: 11 months ago