Totally understand the predicament you would be in. None of this stuff has been misappropriated. I have just been discharged (honourably) from the RAF. I am a magpie and collected loads of stuff, and been given loads of stuff (stuff actually being thrown out into large containers for destruction, you wouldn't believe what gets thrown away).
I also have friends who are leaving/have left the forces and have passed things onto me to sell. You obtain any piece of kit via a loan card/personal kit book. Everything on that book should be returned at the end of your time in. Supply will eit