I am the other stick shift advocate - I say go for it. Check out the AC, though, and finger-check the brake rotors.
I agree - $6500 is high - I would not think that there would be be a huge demand for this car as most MB buyers want an AT!
Also agree you have a hydraulic problem with the clutch if it otherwise acts OK.
Keep us posted!
Falls Church VA
'86 300E 5 speed
'95 C220 (wife's car)
'98 Porsche Boxster
Past: '79 280E, '82 300D (18 yrs), '77 240D,