How much oil consumption? For that price it's hard to go wrong. The main thing I would do is once the car is warmed up, loosen the oil cap and see how much blow by you have. If the cap gets blown off the valve cover, not a good sign.

Without knowing the car's history its really tough to know what you are buying. I bought a 240 4-speed for $700 without knowing anything about the car. Because it started and drove well I went for it. The car has been pretty good so far. Maybe you'll get lucky too.

__________________
Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)