I agree with what everyone has stated. Definitely bargain him down, my father owned an 84 300D with a perfect interior and an average exterior 90K, the car was totaled and only worth $4300 two years ago.

As far as gas mileage it really depends on how you drive. The car is really reving when your doing 70mph or better so mileage suffers.....of course this was a 4spd manual. Anyways if you do go for it good luck!

Placo1