[Tervuren]

Realistically

Well...on one 944 I spent 12X what I paid for it within the first few years on parts.

On another, when a pick up rear ended it and totalled it, insurance gave me $800 more than I had paid for it, including any maintenance over two years of ownership.

So....

Its a matter, if you have to ask, avoid. You can find a seeming perfect car needing nothing, that one year later needs everything.

Mid/low mileage cars will give a lot of trouble from dry rot. They also may not have had fluids maintained properly based on time, rather than miles. They are potential trouble.

High mileage car, will likely have worn metal parts if they haven't been replaced.

Any part not resistant to rust, may need to be replaced regardless of age. My original clutch on my low mileage car bought with about 50K miles on it, said bonkers at 100K and 30 years when the rubber center separated. = Clutch Replaced.

Bad bearings on my 200K+ mile car = Clutch Replaced.

As for nickle and dime you, depends on what level you want to maintain.