Big D's list is pretty good. I'd say that when I bought mine I was a bit surprised by one bit of trouble I had - the steering rack. I did not anticipate replacing that - $1000. I spent 5k on mine and it needed everything done and I had the Barn Man do it at home on the side! So, that was clutch, fluids, valve adjustment, TB/WP/Hoses/2 oil cooler hoses, steering rack, Axel boots or CVC boots, expansion tank replaced, master and slave cylinder replaced. I think that was about it. That was a lot of work for 5k. I don't know if you could get that done as cheaply.
Now, I bought a car that had been fairly well maintained but it's 18 years old. My car came with a stack of reciepts, the AC was done, the speakers were done, the window thingys were done, a clutch had been done - some people just don't know how to drive clutches - TB/WP had been done too. So it's not hard to find a car maintained pretty well that just needs some things again. So I'd definitely be expecting any car down low in the 20s to need at least 5k minimum. No one sells one that cheap that doesn't need stuff! So don't kid yourself. Maintenance for the big items are expensive.
Now, I bought a car that had been fairly well maintained but it's 18 years old. My car came with a stack of reciepts, the AC was done, the speakers were done, the window thingys were done, a clutch had been done - some people just don't know how to drive clutches - TB/WP had been done too. So it's not hard to find a car maintained pretty well that just needs some things again. So I'd definitely be expecting any car down low in the 20s to need at least 5k minimum. No one sells one that cheap that doesn't need stuff! So don't kid yourself. Maintenance for the big items are expensive.