Lots of people make the same assumption, and companies take advantage of that. E.g. if they want you to buy a bottle of wine at $10 a bottle, they'll place plen

Lots of people make the same assumption, and companies take advantage of that. E.g. if they want you to buy a bottle of wine at $10 a bottle, they'll place plenty of $10 bottles on the shelves, as well as some $7 bottles, with the assumption that you'll regard them as bottom of the barrel crap.