It is very difficult to obtain a good car in the price range you suggest in US dollars. Cars that sell under $25,000.00 typically require paint and body work, are missing parts, have power train and ZF issues or worse. Even moderate quality coachwork and repainting can run $10,000 or more. If originality is important to you, please make the extra stretch and spend what you can afford.
Interestingly, a car from Canada is here in California that is of very high quality. It has the same owner for over 20 years and has been treated to a restoration. You can see the car by visiting this link: http://www.pim.net/ber71.html
Good luck in your search and let us know here at the bulletin board what you end up purchasing. We welcome you to this great hobby!