Upside/Downside of buying 80's 380SL?

[300EJax]

I've been considering buying an early to mid 80's MB convertible for a few months. There seems to be a good selection in the 5k to 9k range that appear well maintained from appearances. I'm wondering what you think I should be looking out for, what maintenence costs I should expect, and what kind of reliability issues there are in the SL's of that period?

I'm a relative newbie to MB- owned a 300E for about a year now- and appreciate the direction.

Thanks in advance.