Personally I think it's mostly the last one: I know what sandwiches are "worth" and you are trying to fleece me, or your high price is because you are bad at ru

Personally I think it's mostly the last one: I know what sandwiches are "worth" and you are trying to fleece me, or your high price is because you are bad at running a business and it's not my problem. No one likes to be conned or make up for someone else's mistakes, that stings a lot more than just paying a few dollars more. I've noticed a vaguer version of that train of thought in my own head more than once.