I dropped by my local camera store today and saw two 105/2.5's they had for sale. I asked prices and she said one was the Pc version (perspective control? how? I saw no knobs) and one was the "normal" version. $90 and $80 respectively. Despite it being so cheap, I don't know. I own an 85/1.8, so I don't know how much I'd use it. I also tried out a 35/2. Now that's an amazing lens. What do they normally go for used?