... a thing called Ethics, whose nature was confusing but if you had it you
were a High-Class Realtor and if you hadn't you were a shyster, a piker and
a fly-by-night. These virtues awakened Confidence and enabled you to handle
Bigger Propositions. But they didn't imply that you were to be impractical
and refuse to take twice the value for a house if a buyer was such an idiot
that he didn't force you down on the asking price.
-- Sinclair Lewis, "Babbitt"