What do you mean crazy high? The amount of shops that will take an old European car like that are few and far between and they'll certainly charge you a premium for it.

Say, you go for the cheapest option and get minor services done at around 500-700$. Okay, a medium or major service is going to be over 1K and you're bound to have one. Down 2-3K if nothing goes wrong, at all.

But if something breaks, you're going to be down 2K at minimum for the part itself (not counting labor) and your car is going to be in the shop for two months while the part that broke is imported, and that's if you bought a Chinese replica. Original parts might as well equal the total value of that car.