That's definitely true for random cheap things you're looking to buy. Unless you need it quickly, there is no reason to buy on it Amazon. You can often find the exact same item on Aliexpress for much cheaper. Shipping has gotten a lot faster from Aliexpress these days, too, though it's still on the order of 1.5+ weeks for most stuff.

The types of products I'm willing to buy on Amazon is quickly shrinking because you can't really go to Amazon for assurance that the product you are buying is genuine anymore, either.

I've gotten 2 counterfeit micro SD cards (confirmed counterfeit by contacting Sandisk) that were "New, Ships and Sold by Amazon.com" in the last few months. They had barcode stickers added to the back of the packaging which, from my Googling, turned out to be stickers Amazon places on returns which made what was going on pretty clear. Someone orders genuine sd cards then returns counterfeits, and Amazon just spoils their inventory by blindly accepting the returns and throwing them back in the inventory to be sold again.

Amazon has no place in their customer support maze to report this and if you try to leave a review saying you received counterfeits (which isn't even the right place to complain about this issue because it's a fulfillment issue, not a product issue, but they leave no other choice) they block your review then pester you with a chatbot asking you for more details about why you think it was counterfeit but limits your responses to multiple choice options that don't fit then gaslights you by saying the product couldn't possibly be counterfeit because Sandisk is a trusted partner (the same company that confirmed they were counterfeit).