Allow me to play a little devil's advocate here. Let's say you bought a used Boxster from a private party ( and you were stupid enough not to get a PPI ). The next day you take it to the dealer and are told that the car would require $5000 in repairs. Would you :
a. Say "oh well, I should have got a PPI"
or
b. Go back to the guy you bought it from and pitch a fit ?
blkboxster, I think you did the right, honorable thing, even though you were not aware the car needed the repairs and did not have to refund the money.
Karma, baby ! It WILL come back to you
