You may be able to find ignition points from some other car that can be adapted for far less or rebuild your points from parts of inexpensive new points. Also I would highly recommend installing a Pertronix ignition. I don't think the timing of the actual event is that important but not sure of the optimum dwell time. Dirty/old trigger points will really affect operation-when I bought my car the PO had thrown a lot of money at it and cleaning the trigger points and installing a Pertronix cured 90% of the drivablilty problems.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT