It's also incredibly annoying that Amazon slurped up AbeBooks way back in 2008.
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biblio.org is a good alternative where I am (although personally I don't see the problem with having either the print-on-demand books or buying used from Amazon as an option).
Isn't AbeBooks for collecting old books? That's what I use it for. Abebooks and eBay. lots of out of print vintage niche books that way, like early JA->EN translations of novellas.