please have a look on www.mobile.de and have a look on "Borgward" - there is one (condition: 3).
The seller is an old man, round about 75 years. The motor has a good sound, parts of the car could be "refreshed". The price should not be more than 20,000 Euro. (I saw the car last year in Bavaria, but I decided to take another one that is in reconstruction now.)
Greetings from Seevetal (close to Hamburg),