I got a used water pick from Amazon - the replacement stopped working after the second use. Too many of their products are low end Chinese ware better bought off Alibaba - they cannot be resold or donated. They are simply junk.
I don’t buy much from Amazon except books and some hand tools. When I’m considering the purchase of a power tool or appliance, I do like to read the 1- and 2-star reviews on Amazon, then go buy what I want at a real store.
I ordered a floor fan from them once.. instead of the floor fan, I received a box of high end copy-paper.
I was finally able to contact them, and they sent the fan and told me to keep the paper.