I just bought a 2007 Limited roadster (automatic) with 1600 miles on it for $20K. There is a perfect black 2005 Limted roadster at a dealer near here with only 11,500 on the clock and an asking price of $19,973.

I think your dealer is a little high, given what I've seen of prices, but it all comes down to the car in question. I agree with others - if it's what you want, go for it.