The name Tradio has been trademarked by Simply Local Broadcasting, owners of 106.3 WRIL in Pineville, KY. So other stations have turned to synonyms like Swap Shop, the Trading Post or the like. One notable major market outlet is Wheelin' and Dealin' with Dave Ramos on WTAM-AM in Cleveland, OH. KDKA-AM in Pittsburgh, PA airs Tradio from 4:00 -7:00 PM every Saturday. WCCO-AM in Minneapolis tried out The Great Garage sale in 2008. But typically these shows are found in small metros.
What makes the format more notable is that for years now it has been the comedic target of of the Howard Stern Show.