Purchased this M-One Digital motor back in February from Loonworks.com for $2675 and waited over a month for it arrive. Never got a chance to use it other than testing that it works. The Digital motor is different than the analog M-One motor in that it can automatically calibrate itself to lenses. Selling for $2400 with shipping included for USA & Canada. Comes with original receipt. Email andrae at facetmedia dot com or PM if interested.