Greetings! Recently a combination of events made me think about a) Taking up Photography again AND b) Ditching ALL the Electronic Guff and going Totally old-school ie Mechanical Camera and Monochrome Film. Being on a limited Budget, the Stuff on Ebay (When I looked) was a) TOO Expensive and b) Lacking in Purely Mechanical DDR Cameras. So I Purchased a £10 Russian Zenit 11 with the standard Helios 44-M4 Lens. Shortly afterwards, I Purchased 2 DDR Lenses that fit. 1st a Pentacon f 2.8/135. Then a Meyer Optik Gorlitz f 2.8/ 100 "Orestor" early series "Zebra" style at a Total Cost of £42 Including New Skylight Filters. A bit of Research revealed that the "Orestor" is fairly rare, and I found prices ranging from £115 To £244-45 for a good one as above. Does Anyone know of a Reputable Price Guide for East German Photographic Gear And / Or Anything else that may be of use? Thanks!