How much should I sale Pentax K100D for?
Well, there is a dealer selling K100D bodies in the box with all accessories and full warranty for $175. If yours does does not have any of these things other than the camera (no battery, charger, cables?) and a non-US version, you would be lucky to get any more than $100-$125 for the body. With the lens, you could top $200. The best thing to do is to sell it on ebay with a starting bid of $0.99 and no reserve. It will sell for the going rate and you might be lucky and get into a bidding war. If you start with too high of an opening price or too high shipping charge, you will lose bidders, guaranteed.