There was no yard sale in this episode. Instead, the members of the Sigma Alpha Epsilon fraternity washed cars in Clean Sweep's first-ever (and unfortunately, almost certainly last-ever) charity car wash. They raised $60 for Children's Miracle Network and Clean Sweep agreed to match that for a total of $120.
The sorting / initial purging was handled quite differently in this episode. There was no initial sort with Tava. Two piles were set up --- Keep and Toss, with no Sell pile. Gabe and Segnick stayed outside to help Peter sort items into these two piles, while the rest of the fraternity joined the Clean Sweep team in helping out with the work on the party room.