We all know about the massive online retailers but where do you go to find what you need?<p>I recently used https://www.geartrade.com/ and https://www.thriftbooks.com/ and it sparked a little obsession into finding deals on other items.
Read the title and came here to say thriftbooks, lol.
Although they've gotten a bit greedy over the last few years, sadly.
Some books are on Amazon for cheaper and they're brand new. Especially tech books. For example, Hacker's Delight is $56.70 on ThriftBooks, and $51.36 on Amazon (with one day shipping, if you're a prime member).