From a New York Times story by Sarah Baird headlined “Listeners Tune In to Buy, Barter, and Bond”:

If you listen to local radio stations in much of rural America, you may hear a host bantering with a caller in search of help installing an oil pump in a Chevy engine. Another caller may be trying to trade a few bales of hay for a wheelchair lift. Perhaps even a burial plot for a cat.

These are “tradio” programs (a portmanteau of “trade” and “radio”), where people buy, sell and swap items or services — and, through such offers and transactions, give small glimpses of their lives.