Need some answers Quick..if possible!! Looking at a car today

[FloridaGuy]

Ok..
Looking at a car today. 84 380SL 71,000 miles Silver Blue with Navy leather.
Could a 84 still have the single chain? Or is that not an issue. Pics look great. Only flaw they tell me is one small hairline dash crack up near the window. Leather is supposedly perfect and car is in excellent condition. They are asking $7975 and are negotiable. They are snow birds leaving Florida in a couple weeks and want the car sold before they leave for the summer. Thought if it was great I'd offer $6500 and see if they grab. Providing it checks out that would be a good buy, right? Any other major questions I should ask?
Thanks in advance.
Ed