Is a $500 Mercedes 240D a worthwhile winter project?

For the past couple of years I’ve been driving by this older 240D sitting in an older couples driveway and I finally stopped and asked about it. It was last registered in 2009 and has been sitting since. 200k miles and it started instantly after the glow plug lights went out. He said I could have it for 500 with all the spare parts he’s got. I realize they are incredibly slow and there will be a zillion little glitches that creep in after a car is parked. Worth it?