What should I look for in a 380 sl (1981 1983 1984)

[bpittman13]

About Me: I know the cars basics thats about it. I've had classic cars before but never a mercedes of any sorts. My best friend is handy with cars mostly Land Rovers.

About the Cars:
1981 380 sl red tan interior both tops goods 125000 miles. I have seen it yet. Its in driving condition, ac doesn't work interior is in fair condition. I don't know if timing was changed to dual.

1983 380sl black on black think it may have a leak on hard top. soft top has a tear. 178,000 miles. Drives good suspension and brakes are good. interior fair. AC blows but warm(maybe needs charging)

1984 380sl blue with white interior soft top has tear in seam. He thinks fuse maybe blown lights went out. Antenna up/down works maybe a cylinder leak. 162,000 miles. I don't know if timing was changed to dual

About the Prices:

1981 $4000 negotiable (I haven't spoken to him yet waiting on a call to see how negotiable and to take a look at the vehicle)

1983 $3000 kinda firm at the price (but cash hasn't spoke )

1984 $3100 but states he very negotiable. But I haven't went out to take a look at the car yet only pictures

My questions:
1) How fair are these prices?
2) What/Where should I look? (Rust prone area)(timing chain)....
3) Are these some of the better years of production or should I look into others?


Thanks