Which of these should I buy?

I have been looking for a sunday driver, fun car, but am only 20 years old, so I don't have too much money too spend. I found two beautiful cars on a farm in my town, the first is:

a 1980 BMW 6-series (the 635 or 633 badges have been removed) Manual, 85k miles, black on blue (yuck). Has a broken Radiator, and very few rust spots.

the second is a 1984 Mercedes 500 SEC with only 64K miles! Gold on tan (eek), not a spot of rust, cables that connect to spark plugs are disconnected (anyone know why?)

Both cars were driven to their resting spots, and have only been out in the snow for one year. He wants to get rid of both at the sametime, so I'm wondering which I should take? Which one would be less expensive to maintain?

As for me i would get the BMW, cant even compare a bmw to a cedes, better all the way around, look on the drivers door for the model, 633, 635 and only 85K miles to boot!!! that thing if properly maintained will last over 300 or even 400,000 miles, i have an 84 633 csi with 200,000 miles and autocross and drift with it nearly every weekend and still holding its own. It is totally stock except for the 16" wheels and tires and exhaust.

go w/ the 6. Looks better, and as was already stated, if taken care of can last a long time.