1. Anything procured through the 1033 program from DoD has to be audited and accounted for. Uncontrolled items are tbe department's after a year. Controlled items like vehicles, guns, or NV are never the agency property are always owned by DoD.
2. While the only way to get rid of 1033 acquired controlled items is to return items on "loan" by the DoD, the DoD don't want anything back ever and expects you to keep track of and house anything you get until the end of time. Use those NODs to cannibalize to repair other NODs. Use that truck as a prop on your SWAT range, etc. Perhaps it is different with current controlled items, but that is how it was a few years back. The only way to return your stuff in actuality was to get removed from tbe 1033 program otherwise you must account for NODs and scrapped vehicles until forever. And they WILL get audited and they WILL find out the NODs are missing.
3. LE treats equipment like crap. Unless it never got used, expect it got used and abused in the worst ways possible. NV was dropped, turned on indoors, lenses wiped with dirty paper towels, pointed at with IR lasers and flashlights, etc.
If you buy a shotgun, expect someone used the bore to store their chewing gum wrappers like a convenient vertical trash can until the barrel was full... and yes, this was one I saw with my own eyes in our 14" Benelli M1 Super 90 shotguns.
My advice, don't buy used LE anything unless it was stored and forgotten and still like new.