You can try Ebay or, better yet, google what you’re looking for and buy it from a small business.
I bought a new kindle this week which is made by Amazon. I had to bargain with myself - bought it from Best Buy so Amazon only received wholesale price.
Amazon and ebay both need to be passed over. If you go to google and enter the title of a book and then click “shopping” you’ll find alternatives.
Other than that I don’t advocate using google either!