I have a running list of things I've had fixed or replaced on my '89 which i purchased in 1996. I now have 134K miles on the car. It was a daily driver for my wife for over 10 years and was used in all climate conditions (including road salt). The big ticket items for me have been converting the A/C to 134a, replacing the gas tank, replacing the brake lines 2x's, struts at all 4 corners, brake pads and rotors, and a myriad of other things. I'm not handy with mechanics so these have mostly been done via a dealer. Things can get expensive. I know I have over $4K in repairs since purchase, but again, that's been over a 25 year span. But, its my wife's favorite car. So....... But the repairs in the long run have been cheaper than a new car payment.
Caveat is as stated by 2seater - condition, condition, condition. If you have the wherewithal, if you can take the car your considering to a mechanic, or even a good buddy with mechanical knowledge, to look it over could help in your purchase consideration.
However, if you buy, this site, with many knowledgeable people and "how to's", vendors, etc. is a godsend. Gook luck.