Night Vision Used NVD values?

[deersniper]

Any idea on what these used devices are worth? Hard to find completed sales on eBay or the various forums. Thanks
top to bottom
Gen 3 PVS4
Gen 3 "Python"
GSCI TWS 37, 320 resolution, 60hz

[IMG2=JSON]{"data-align":"none","data-size":"full","src":"https:\/\/preview.ibb.co\/jLhu0m\/image.jpg"}[/IMG2]

 

[mj36639]

Many years ago I sold quite a few gen 2 and gen 3 PVS-4s and NAIT Pythons. Based on what I sold them for then I would say the PVS-4 is worth $1400-$1700 and the Python about $850.