They are nice cars - I had a 280CE years ago , petrol blue with mushroom interior and 'Mexican hat' wheels , very nice car to drive .
These days , good ones tend to be pricey and the M110 is a thirsty beast , sub 20mpg most of the time , unless you are gentle on the throttle .
A lot of the window seals , which deteriorate , can be expensive to replace , and the rear quarter window mechanisms can get sticky , tripping the thermal reset fuse .
A good one will be an appreciating asset , and enjoyable to drive .