I have thousands of orders on Amazon and have never received something different than what I expected.
Have I received items that were crap? Sure, because I chose to go with the noname item from the random seller for cost reasons. If it’s unusable I just return it.
That said, I don’t think I have even a 1% return rate. Buy items with a few reviews and read the top reviews instead of only trusting the star system and you’ll get exactly what you paid for 99% of the time (and will get your money back the remaining 1% of the time).
It's more involved than that. You can buy a brand name product shipped and sold by Amazon.com and still end up with a counterfeit item because Amazon mixes inventory with third party sellers.
Have I received items that were crap? Sure, because I chose to go with the noname item from the random seller for cost reasons. If it’s unusable I just return it.
That said, I don’t think I have even a 1% return rate. Buy items with a few reviews and read the top reviews instead of only trusting the star system and you’ll get exactly what you paid for 99% of the time (and will get your money back the remaining 1% of the time).