I see some surplus masks for a decent price, but know nothing about any of them.

This is what I own.



The M-40 Full Facepiece has been used for years by U.S. Armed Forces all around the world. This facepiece has been NIOSH-approved with the 3M™ Cartridge FR-C2A1 or 3M™ Cartridge FR-64 for acid gases (including chlorine), CN, CS, and P100 particulate filter. The FR-C2A1 cartridge meets military specifications MIL-C-51560 and EA-C-1704. The FR-M40 full facepiece respirator has the capability to mount a single FR-C2A1 DIN threaded cartridge on either the right or left side.

Most "surplus" masks are expired and probably of dubious utility at best.  

Fortunately, there are new, perfectly good masks available on the market.

Unfortunately, they're quite expensive.  

What is an approximate price for these?

And where could I find one?

For what use?

Chemical, Biological, Radiological?

I would see what Israel makes available to civilians and go from there.

Don't skimp on this.  Get an M-98 for $100

It's a score.

I spent FR-M40 Mask: $264.50

3M Cartridge FR C2A1 Gas Filter $47.90

I have a ton of this stuff already from the government and what I was issued. I only had to  spend for the mask since i have 7 unopened cartridges  here at the house.