I live in the US and out of hundreds (thousands?) of purchases only one or two have made me question if they were counterfeit, and even those worked well enough

I live in the US and out of hundreds (thousands?) of purchases only one or two have made me question if they were counterfeit, and even those worked well enough and I didn't return them. There may be a selection bias in the comments you read because the countless people like me never post their experience and the 0.001% who unluckily were repeatedly sold counterfeit will likely post about it.