Per David Smith at CCC Racing at his stihl shop down by him.
Ballpark is $26,000, there are a few options to make it cleaner or faster that can add to the price.
In the local Stihl dealership they love it, in 6 minutes it will do a chain nicely unattended and a light on top signals when it is time to stick a new chain on it. The machine is in the middle of the 2 cycle area of the shop and which ever tech sees it first swaps chains and goes back to whatever he was doing. It runs 8 hours a day with minimal maintenance, and they are able to keep the wait time for drop off chains usually in the 2-3 day timeframe. They can slip an emergency chain into the que if needed. Many tree services drop off 100 or more at a time and get special pricing. They could not hire an additional tech for a year for $26K, even before benefits, taxes, etc. They love it.