A prototype of the SLR Magic HyperPrime 50mm f/0.95 M-mount lens is now listed on eBay. The current price after 19 bids is $1,550.00 with 14 hours left. The MSRP price of the lens is $4,288. Lens description from the eBay listing:
This auction is for a beautiful Noktor "Hyperprime" LM 50mm f0.95 lens with RF coupling for Leica-M series cameras. This un-serialized prototype lens is in excellent condition, with no scratches signs of use on the barrel. Except for a piece of dust (shown in picture below) on an interior element, the optics are clean with no scratches, fungus or hazing. Lens includes original front and rear lens covers only.
Here are some images taken with a pre-production SLR Magic HyperPrime 50mm f/0.95 and Canon 50mm-f/95, Leica Noctilux 50mm f/0.95 and Voigtlander 50mm f/1.1 lenses for comparison: