That's funnier than anything I've read in awhile. I sent a similar letter to a Mini dealer who had the audacity to offer me almost 50% below low wholesale for a trade-in - the same dealer I bought the car from. I traded it yesterday for a new Subaru, the dealership of which who gave me above trade-in value because the car was so clean and meticulously maintained.
The audacity...my my; I'm glad you responded in that manner.
Are you now going to change your tag line to "Life is about a little kid driving a Subaru?"