(Price drop to $400) Swarovski Anti Fog Lens (AFL) system

Swarovski AFL (Anti Fog Lens) ocular device with battery ($829.00 retail). Includes a second battery ($99.00 retail). 
 

I bought this device as part of a package with a Swarovski scope from another Gunpost member. The AFL was said to be unused, and I have no reason to think it isn’t brand new (no wear marks, etc). I have since sold the scope, so I don’t have an optic to try the AFL on. I was told that these devices are awesome for cold weather hunting.