If I have to buy something on Amazon I've gone out of my way to make sure I'm buying from them directly lately. Too many issues with them pulling crap like this when it's a third party seller. But by forcing them to be the seller I force them to also be subject for that transaction to my state's consumer protection act. That seems to cause them to care more because suddenly they are on the hook because they are not just the marketplace.

The biggest indicator missing is value. Like, 5 stars for a 30 dollar vacuum pump... if it works a few times I would give it five stars. For a 300 dollar one. It better pull the needed mmhg perfectly and work for years. There's a use case for both