Maybe a stupid question, but why not...even sell it to a person and make some money back to put toward the use of something else?
The military is not equipped or in the business of selling. You have to answer basic questions like "who directly takes the money?" "where does it go from there?" "who approves the sale?" "how should the item be valued?" "who should be the expert on identifying the item and placing a price on it?"
Pretty soon you have a bunch of people ransacking and looting military supply to sell "unneeded items". Since there is no place to submit that money, it goes in their pocket.
The army and airforce use DMRO (now DLA Disposition) the navy and marines should have access to this as well, since it is a DoD wide entity.
Think of it like a network of the
BEST junkyard/scrapyard you probably won't have access to. Tools, machines, vehicles, supplies, even real estate.
Items can be distributed through other military units or branches. For example, an "outdated" deuce may be transferred from active duty to national guard. (for the most part that actually happened a long time ago)
It could be transferred to other federal/state agencies. For example, an "outdated" 80s silverado could be transferred to BorderPatrol.
At one time we received our snap-on in a transfer from the airforce. Pallets and pallets of tools. Some broken (no warranty on some) others with missing pieces, yet others complete but "excess".
Others may be transferred to foreign governments. Saw quite a few vietnam era UH-1 "hueys" buzzing around the middle east.
Training and base support functions such as "range control" or base fire department may reutilize said equipment.
Finally, after all of the above have picked through the best of the bunch, remaining inventory may be sold to the public in a auction type format. That of course depends on the nature of said equipment. Don't expect an abrahms to pop up on the GSA auction site anytime soon.
Sometimes it is 10tons of scrap, 3 deuces with locked up/missing engines, pallets of misc tools, office equipment, medical equipment, ect. You submit a bid, usually really low, and walk off with your shining junk pile. There is no shipping, they typically have very strict rules on how/when it must be removed off site, and there may be permitting requirements to enter or remove property. I woulda swore they used to sell armored personnel carriers before, but if they were, that practice has now stopped. So did the humvees.