I am thinking of buying a Mercedez Benz C230 4 matic with 115,00 miles for 7200, car is in mint condition. is it worth it?

What year is the car?

For a 2007? $7200 is very low. That may be a good thing or it may be a case of too good to be true. KBB lists that car at over 10K in excellent condition for a private party transaction. In fact, the seller should be able to get $8500 by trading it in at the dealership. so I would be a little leery. you would be wise to run a car fax on the vehicle to make sure it hasn't been in any accidents, and do a very thorough inspection yourself. you should also take it to a trusted mechanic to have a closer look. If it sounds too good to be true, it probably is. of course, I hope everything turns out to be legit and you get a great price on the car, but just be a little cautious.

of course it is. It's your opportunity to use it, and make it less than brand new looking.