All, I've recently obtained some MF equipment from my dad. Its hard to find what the going rate is for this used equipment. I've searched ebay and the classifieds...but nothing conclusive. Can you guys give me an idea what I should be asking for the following?: 1) Pentax 645N Body 2) Pentax FA 645 45-85mm f4.5 Auto-Focus 3) Pentax 645 200mm f4 4) 120 Back, 220 Back x 2 All are in great condition. Thanks!