Reminds me of the following:
A friend of mines build in gps died (beyond repair) a few days after the warranty had expired.
As the gps came with the car (package deal), they decided to cut him some slack when he complained that buying the same one would cost him 2500 euro, and its some internal error that caused damage, which is not his fault.
They (the car dealer) told him that they are almost closing, but that he left a note that the invoice should be reproduced, but lowering the price of the gps by 30%, next time he calls back.
So he called back, over and again, and pointed them out the note, dropping 30% each time, until his bill was around 500 euro.
Then he was satisfied and paid.