The highest priced items are that way mostly due to the marketing costs associated with selling high priced items and trying to create the illusion that it is better quality.

Lifetime guarantees are pretty much worthless because most people will forget they have one, lose the item or lose the documents related to it.

Top pay doesn't attract the best people. Top work attracts the best people because the best people have most likely realised that money doesn't really matter if you're working on something that doesn't provide meaning for you.

The sweet spot for quality is to figure out the approximate average price of the product you want to buy and then pay a little above that.