So, I'm helping a friend clean out his shop and he has a 1990 190E, 202,000 miles, exterior is in great shape (except for the layer of dust), interior is good as well, just light wear on some buttons and a couple of the wood panels are cracked (surface). The bad part about it is that the engine blew a head gasket (maybe) and it was parked that way. He partially took the front apart to try to take the head off, but when he was working on it he said that the oil pan was full of coolant (drained now). The motor is locked up (M103, 2.6l), as I tried to spin it with a wrench, but did not force it. All he wants is 500.00. Worth it? Is the engine ok? I have not dealt with Benz's since my 560SEL in Japan (same engine).