If they're only asking $2450, I'd go check it out, and if it seems OK, I'd offer them a lot less. Seems like they just want to get rid of it.
If you could get it, for say, $2k and decide a few weeks later that you don't want to keep it, you should be able to get your money back out.
What could possibly go wrong
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1979 240D, 4spd manual, Power Sunroof, manual windows, 147k miles, Pastel gray/Black MB Tex.
1991 300D 2.5 - Smokes like it's on Crack!