Actually, the only thing I can think of is making slave-based shops.Youd put the slave in some guarded town and tell him to sell your items (for caps) or barter (there would be a line what do you accept: ammo/armor/guns/misc and only the things you want would be accepted)I dont know if this is a good idea as it would spawn a hell of barter NPCs hehe
they could be guarded by a merc but of course this is a LONG future Id like to see player based shops and your mercs/slaves to protect from stealing on you