Another way to look for non crap, is to check the used value of something. E.g. check swappa. If people are still paying a lot for an item after it is used, usually a good sign. If they are not and you still want it, get it used and save a ton.

Another good way, check how much insurance costs. e.g. How much is that extended warranty going to cost on one car vs another. How much is home owners insurance in one neighborhood vs another. Insurance companies that make mistakes here go out of business.