Best part about bartering is the man doesn't take his cut :-)
I often attend Rainbow gatherings where people form trading circles as cash is frowned upon at gatherings unless it's a donation to the magic hat at supper time. Around Panama, it's more of a gifting thing with extra produce and the like and some things always on the stove for guests that drop by. No need to avoid the tax man here because he doesn't exist yet.
Great post...Following for more
Cheers