I honestly understand wanting to make a sale....
What I do NOT understand is, when a customer returns your e-mail and graciously declines to do business with you, and tells you that she did not see anything she liked on your site and has decided, with the advice of her MOST LOYAL TRUSTED Mechanic, to keep her car a bit longer....
Why you as a salesman can not just thank her for her time. Why do you feel the need to write a snarky e-mail disrespectfully challenging her choice? Are you so stupid as to think that she won't cut you off, complain to the referral agency and write about it on her Blog?
You, Mr. Enterprise Car Salesman are a fool, and you have lost a potential customer.