I dont think you came off as a dick at all. In fact, I have seen more asshole responses from people on ebay about their cars you wouldnt believe.
I once asked a guy with a porsche for sale if he would negotiate the price by a fair amount. He responded with 3 paragraphs about how it was the BEST car ever made, it was rare, one of a kind, and id never drive anything like it. ... it was a 944 with a busted trans lol.
Current Stable: Some Audi with a V10, Couple of BMW's, one F Car, and one P car. One lonely GT-R with all the Euros.