Vending machines would be a lot more user friendly if they didn't always demand money. Maybe I don't have $1.25 for that can of soda. Maybe I've got a seventy-five cents and four cigarettes. That seems like like a fair trade, right? Well, with the Swap-O-Matic, I can now find out.
The post-apocalypse recession is bound to be a doozy. If you don't have the stomach for looting (why aren't you in heaven, pussy?), or don't have a gold stockpile, you'll probably have to barter for basic survival needs.