[52-6F-62]

I almost don’t want to share this because it might get picked over but Alibris has been great.

You do have to be careful as you could receive an unauthorized print from a less scrupulous dealers but I’m not sure how common that is. I don’t think I have personally. One copy I received had me question it because it was a bad printing but it appears to be a licensed print (C Programming Language, 2nd ed)

https://alibris.com/

You just have to be willing to wait for the shipment and be willing to keep your own private library.

Edit: looks like the beans had already been spilled on that one. Well my experience has been good