The Voigtlander Heliar-Hyper Wide 10mm f/5.6 Aspherical lens for Leica M-mount is now $150 off at Adorama, Amazon, and B&H Photo:
More discounted Voigtlander lenses for Leica M-mount can be found here.
Previous coverage of the Voigtlander Heliar-Hyper Wide 10mm f/5.6 Aspherical lens for Leica M-mount can be found here:
Voigtländer VM 10mm f/5.6 lens US pricing announced, finally available for pre-order
Voigtländer 10mm f/5.6 Hyper and 12mm f/5.6 Ultra-Wide-Heliar III lenses specifications