probably pay between 26-40k. Year doesn't seem to matter. None of them have high miles, most under 5k when I was looking. I have already put 5k on it this year, no mechanical problems at all, except due to NYC potholes and the tires coming off the rims.(poteholes were 1 ft wide by 6-8 inches deep, more like trenches)
Don't make them any more, and the market is rather limited. They only made approx 300. It is missing some things normal cars have, like roll up windows, and a cigarette lighter(although you can custom wire the radar detector in...)
One of the most fun cars around, easy to whip around. Exhaust is the best I have heard on any other car.
Viper still faster, and feels more "solid". different cars, both fun. Got in until the elise comes out, although now that I have it, not 100% sure.