Where do you live? What do you use Amazon for? For instance, I live in Spain and when I shop for electronics I check local sites, such as pccomponentes, electroprecio, wipoid, mediamarkt, fnac, el corte inglés and a bunch of others. Also aliexpress or ebay, if I need relatively cheap stuff.

Depending on product type and region https://en.wikipedia.org/wiki/Comparison_shopping_website#Major_websites