https://keepa.com/!

I use this extension to get a general idea of whether a product usually goes for cheaper and whether or not to wait. Really conveniently on the Amazon page directly.

Doesn’t have unlimited storage though. It’s really nice being able to jump to any of the 15,000+ images shared with a single person dating back to like 2015 within a couple seconds. I know that’s a privacy concern but nothing comes close to telegram’s searchability and the unlimited storage.