Should you buy a 1987 Mercedes Benz 420SEL that needs a radiator The Car is only 850.00 Should you hop on it?

Yes - the 87 420 and 560 are great cars and if the mileage isn't outrageous - say in excess of 250,000 miles, and the only serious problem is the radiator - buy it. they run forever - I know, I own one.