S4·E6 What Happens in Sturgis...

Danielle turns up a good lead she's been working on for months. When Mike tells Frank let's pack up for a trip to South Dakota, Frank says he can't. He's secretly going to his 30th annual trip to the legendary Sturgis motorcycle rally, but says he'll cover the shop. So Mike takes Danielle, first to Dollar Dick's, a tough-minded auction aficionado whose yard is covered in rusty gold. Next, they happen upon what looks like a tourist trap, but the 1880s ghost town pays off with a speed pick in a pair of treasure-filled silos that turns up some unusual items. Finally, they get to Dave's amazing automotive collection where Mike spies a sexy belly tank cycle car with classic Hollywood history.