"
Barter Kings" (Wed., 9 p.m. ET on A&E) is a fun look at something people do all the time: trading their unwanted stuff for someone else's unwanted stuff. But these guys have it down to an artform, as Steve demonstrated when he decided he wanted to give his wife a diamond ring for the wedding anniversary.Knowing he could never afford the thousands of dollars necessary to get the kind of ring he wanted he decided to trade his way to it. And ...