If you see one of these - buy!
This car is very rare, with only 7.798 produced examples between 1975 and 1981.
Today, the price is about 15.000 Eur, if you can find one, and it can easily go to above than 20.000 in near future.
Performances were solid, even by today's standards:
2.0 Liters, 120 hp, 0 - 100 km/h in 9.3 seconds.
Old School tech drawings:
And the YouTube video for the end: