My husband has lots of it from his years in the Air Force, most is duplicates, triplicates etc. They are momentos to him, not something he is big in to as far as collecting. So with that in mind is there any way to turn the extras in to cash? Some is from Canada, some from turkey, mexico, england. I have no idea where to start. He is fine with keeping one of most of it and letting the rest go. Just figured if I could sell it, convert it or whatever it would help us and he would still have some as momentos.