They are great cars, but the ACC systems are marginal, prone to failure and expensive to fix. The rear suspension can eat you alive fixing clunks and a tendency to wander. And around 200K, the injection system can develop problems that no one except Steve B can diagnose and fix.
At least in the DC area, it is getting very hard to find shops that can fix them because the '86-88 models don't retain their fault codes. At $2100, I would bet it has one of these problems that someone doesn't want to spend the money to fix.
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe