1966 Mercedes Benz Unimog 404 Funkwagen (14,000 Km, 12 MPG Amsoil Engine Oils and Gear Lubes) Paid $7500 for it. Don't drive it in the winter to avoid salt and rust.
1987 Land Rover Range Rover (148,000+ Miles, 20 MPG, Amsoil Gear Lubes and Engine Oils)- Bought it used 2 years ago for $2000, Had to put in new floors, brake rotors, new pads, new hoses and belts, repair the seat control switches, new front shock towers and shocks. I think I have about $3000 in it total so far including the purchase price.
1997 Saturn SL1 (324,000+ Miles, 10 oil changes with Amsoil 0W-30, 40 MPG) If you want a thrifty car to own get a 1997 or 1998 Saturn.
You can get a good one used for $2000 to $5000. They have polymer body panels except for hood, trunk lid and top so they don't rust much. Should those components rust, you can buy new ones and bolt them on.
The valve guides are shot now as well as first and second gear synchros. They went at about 300,000 miles. I am getting new valve guides in it as well as new synchros starting Wednesday. 2002 Saturn... 43.5 MPG Amsoil in only the engine so far. I now have 48,000 miles on it. Need to change the tranny to Amsoil too. I hate the car though. The seats and headlights are terrible compared to my 97.