A seller on eBay is offering up a Nikon 1200mm F11 super telephoto lens, dating back to the 1970s. A separate AU-1 focusing unit attaches to the lens and drives focus, and is included for the seller's asking price of $5,750. Naturally, the lens features a revolving tripod socket, since your chances of getting sharp images while handholding it would be slim-to-none. 

If $5,750 is a little steep but you're itching to add a super telephoto prime to your vintage lens collection, the seller is currently accepting offers and claims the lens is in 'nearly mint' condition. If you do buy it, could you send us some sample photos for fun?