There are always diamonds to be mined at yard sales. The trick, of course, is finding them. The competitors in “Flea Market Flip” are asked to perform that trick, then they’re challenged to refurbish or reinvent the items they’ve purchased in the hope of reselling them for a profit. Grouped in teams, the contestants in each episode are given a budget of about $500 to hunt for project pieces with potential. The team that does the best job of flipping trash for cash wins all of the profits earned that day. Passionate flea market fan Lara Spencer, an anchor on “Good Morning America,” hosts.