That would not be an AMT accessory that I have ever seen with V1airstart ECU. Which is everything so far that you pictured. Now AMT would need support equipment beyond what you have pictured that would be of value to new owner should he not have anything to get it started. It controls glow plug power, compressed air spool up valve and coleman propane bottle regulation. Do you want more pix of support gear? Did you find a scuba tank laying around. or a blower? Coleman propane bottle with regulator ect.

No, I didn't see any of that around. The only thing was a NOS valve. Then again it looks like he horded all his stuff in one room and threw a grenade in the middle.