You won't have a problem if you buy "big-ticket" (I'm using this word incorrectly, but hopefully you get what I mean. Normal consumer goods(?).)

If you buy something used, or something with a lot of knockoffs (Xiaomi) or old tech (GameCube Controllers) there is a chance you will get a counterfeit.

I switched to buying all that stuff from eBay and it's much better. Untrusted-by-default makes eBay a very healthy marketplace to buy and sell in.