M9 buying considerations

[twopointeight]

I'm in the market for a used M9 and have a couple of questions:

1) If the sensor needs replacing due to corrosion, does that replacement solve the problem? I assume it is an improved sensor, not simple another of the same?

2) Are there serial numbers to avoid?

3) What is a reasonable amount of shutter actuations to acheive before a shutter overhaul or replacement is likely?

 

[uhoh7]

1) it should, but only time will tell.
2) No
3) My shutter went at 110K

Often you will see M9s just back from NJ for sale with a new sensor (but not the latest), that's what I bought, and two years later it's still good 🙂

 

[jaapv]

The sensor is the same. The coating - which was the cause of the problem- has been changed. No numbers to avoid. The shutter is stable.