But, I often don't get the books from there. If I am honest, I go to the second hand people in the background. And they often have their own sites. Having just bought a book from BetterWorldBooks, after seeing it on Amazon, I know I could go direct to them next time. Why didn't I do it before? Who knows.
It is much better to go to the seller and let them know you like their prices than go via another big retailer, as they'll probably take a larger cut than what's fair.
Wordery are another bookshop that sell on Amazon and yet have their own site. I wonder if we can visit them directly instead. By all means right click on the links and bookmark them.