Hi Emily, I am new here having just bought a 280SL. My experience if it helps is that I took less notice of the exact model and spec but looked for a car that was genuine and towards the high end of the price range to reflect that it was of better quality. My 95 cost £6,300 a few weeks back. I did a general checkover and then took it 2,200 miles through France. on the way down it never dropped below 100mph (constable) and ran for a good portion at 120 without problem. Everything works exactly as it did when new and no rust, damp etc.
I have been lucky enough to have a range of cars from E. type, various mercs and Porsche through Subaru STi and currently Touareg so think have a fair balanced view. My opinion is that it is supposed to be a pretty, easy to live with sports car. It is nicely balanced with more than adequate performance. Apologies alround but having owned a 500SEC, whilst the power was magnificent you rarely used it and if a problem occured then its engine out time!
Hope this helps. John.