I've heard story after story of how my maternal granddad bartered his services (chiropractic). My grandmother gardened, had chickens and cows, so didn't need many goods. But, for his bone-cracking services, my granddad would take any goods, alive or otherwise.

More bartering will probably take place if things get worse. Craigslist has a barter section (under 'For Sale'). I belonged to another bartering site in the late 90s. It no longer exists, but I'm pretty sure there are others that have popped up.