For sale here is a nice Sigma 100-300/4 for Nikon AF. No dents or scratches, slight paint loss around the tripod collar. Glass is clean and clear. Shutter and iris work exactly as they should. AF is fast and the lens produces very good images, see pics of a distant lamp-post and a ferry in Portsmouth harbour, both shot on May 14th with a D700 at 300mm and cropped to offer 100% resolution when viewed on eBay.
eBay