Definitely had issues with quality and/or damage, haven’t gotten a true counterfeit yet to my knowledge, but I can at least partially attribute that to the fact that I almost never buy things that aren’t shipped/sold by either Amazon or the manufacturer.
When I shop I usually search for something on Amazon, check if the manufacturer has a website & it is comparably priced, check if the local stores (Target, etc.) stock it at a fair price, and if all else fails I buy through Amazon (after checking CamelCamelCamel to verify I’m getting a good deal).