It's very rare in the US, not so rare in the rest of the world except that most have been retired. Consider that the 200 and 200D were probably the most common model produced and sold outside the US throught he 70s. Check recent photos of Iraq and you'll see a few. And it's a W115.

The only cons, shared between the W114 and seemingly identical W115, are rust potential and an impossible-to-replace heater blower motor. Everything else is from the good old days as MBs go.

Sixto
95 S420
91 300SE
87 300SDL
83 300SD