DWalt
Member
Buy you gasoline, dental work, an electrician to wire a generator into your well, etc.
Bartering ammo or guns for goods and services is risky because someone may use the ammo you just traded to them for some insulin or penicillin to shoot you and your family, then take the rest of your ammo and other goodies after you are dead.
I mentioned that possibility earlier, but it could also apply equally to other trade items. Once anyone knows you have a stash of attractive goods, you become a target of opportunity. Best to have an armed guard or two present during the transaction.