I have to agree with Larry, I have driven my 240D MANY miles past the reccommended mileage for a valve adjustment. After 550K miles, she still has the original valves, but soon I am going to start considering a complete valve job with new seals etc... just because she is burning about a half-quart of oil more than usual between oil changes and that is where I figure it is going
As for the transmission, my car had to get a donor trans sometime after 300K. The previous owner hit a boulder in the road and damaged the pan. The trans leaked out all the fluid and burned up while he was driving.
Oh well, at least I did not have to buy it
If the car looks good and runs good, buy it! You'll not regret the durability of these cars. Have a good mechanic check out the pull on the front end, may just be a bad tire or need alignment. The price sounds okay, but what year is it? '80 or newer? If so, $2K is about normal for 78-82 models where I live.
76 240D (W115) - 550K miles
78 300D (W123) - 200K+ miles