Looking at the issues that you raise, I would imaging that if you spend 2 grand on the car, you can double that based on costs associated addressing the issues you identified and those that you don't know about.

Rust is a big issue, but it depends if it is "cosmetic" or structural. Have someone check it out, and also have the car checked out by an MB tech to see if there are any hidden issues.

It also depends if you plan on driving the car for a few years or a couple and what you're willing to live with. That's a decision only you can make.

Bottom line, however, he is asking close to $1,000 to $1,500 too much from my perspective. You will get a great car, but the follow=up costs may push the total cost of the car up beyond what you would be willing to pay.

But, for 2 grand or a tig over, what do you have to lose, other than 3 grand.

JCD