Ok you can go to Kelly Blue Book and check this out:

a 2005 Manaul Roadster is priced about 13800 if in "good condition". The milage I used was 66000 miles. You can go to the web site and look this up.

The value of the manual shift is what brings down the price. (more fun though)The Auto's are usually 800-1000 more.

Hope this helps. To help you you might want to use google and put in the window :chyrsler crossfire for sale" and see different prices around the us. If you have $15000 most likley you can get a newer one 2005-2006 with lower mileage.