When looking for my E I searched for nearl 3 months, but the car I bought was the first one with complete records, well cared for and in great condition. I paid a premium for it but haven't had any problems with it at all.
If you've found similar jump at the chance to get it, you won't regret it.
Definitely take others advice and get the car checked by a good MB Mechanic before purchasing. Should cost $250 but worth the peace of mind. If problems are found you can use it to bring down the price.
Good luck and if purchased we expect details!