Totally depends upon the "deferred maintenance" factor.
You could easily sink another $2100 into it, and have a forty-two-hundred-dollar twenty-one hundred dollar car...
If it is has been kept up, I have found the annual care, feeding, and repair costs to be reasonable.
For any car, you really need to like it to go through the trouble of keeping it going at 17 years. That is the main thing.
1986 300E 5-Speed 240k mi.