If you can find a good 1984/5 Euro 280SL (dual ohc straight 6) you will get better mileage from one of the strongest engines Mercedes ever built together with the neat bumpers and better performance than from most of the early V8's. The 560SL is faster but thirstier and a lot more common. I have never had any problems locating parts either, though this is one of the bugaboos non Euro lovers tend to promote. Looking in one of the sunshine states will lessen the chances of your picking up a rust bucket