Hey 005, thanks for the info.
As for the C5 that you're after, you want to spend US$18,000 - US$20,000 just to purchase the car in the US (US asking price correct?). I assume you are aware of the other costs involved (shipping, duty, taxes, conversion etc).
If so let me look up some stuff for you.
Any preference, mileage, colors etc.
PS I'm sure you know that a manual convertible is harder to find, and will cost more than the regular, but if thats what you want let me see whats there.