I just talked with Major Surplus. All the wholesalers have increased the cost of gas masks. The good news is the filters are fully interchangeable between the latest Israeli, Soviet/Russian, Nato and U.S. issue units. refrain from buying anything but new unissued units.Average price is @ $30.00 with replacement filters @ $5<br><br><P ID="edit"><FONT SIZE=-1><EM>Edited by Chris Kavanaugh on 09/18/01 02:41 PM (server time).</EM></FONT></P>