Well, there are a lot of ways to make money with mental reservation or evasion. You could be selling a used car to a slightly retarded person, you could be fielding complaints in the complaint booth at a department store (making money by salary), you could be a mechanic required by the boss to always replace the air filter no matter what, etc. You could have in mind a bunch of stuff.
I don’t really care what the used car buyer has a right to know or not. I still wouldn’t be anything but straight with a less than sharp buyer, if I would sell at all. I doubt I would tell the sharp buyer that it would be a better deal to buy from someone else, but neither would I embark upon a mental reservation.
Surely you are not talking about making money off a “mark”, are you? That would be wrong. I *seriously *doubt you meant this, I was just leery of not making it clear.