I just bought off eBay an Argus C4 (or, as it says on the lens, an "argus c-four") in pretty good physical shape but working perfectly. I love, love, LOVE Argus cameras. :-)
So far I have two regular C3s, a C-3 Matchmatic, this C4, and an Argoflex Seventy-Five pseudo-TLR, along with the now-useless little 110 Carefree 2 pocket camera that was the first camera I ever had as a child.