Everything depends on condition of course, but a clean example of the 4cm Zuiko in LTM w/finder & cases for the lens & finder would probably go for approx. $500 on the 'bay (more @ a dealer like Kevincameras or Ritz Collectibles). I got 1 w/out the finder for about $200 (came w/a Leotax body, which is a kind of rare Leica TM copy), but it needed a CLA. If you're looking for a 40mm in M mount to actually use on a daily basis, you're better off getting a 40/2 Minolta M-Rokkor or Leica Summicron (originally for the Minolta CL & CLE) or the new Cosina Voigtlander 40/1.4 Nokton.