adidas via eBay cuts an extra 25% off select men's, women's, and kids' shoes and apparel. (Discount applies in cart.) Plus, all orders receive free shipping. A couple of best bets, with prices after the in-cart discount:
adidas Women's Superstar Bounce Shoes for $33.74 ($56 off)
adidas Men's Swift Run Shoes for $44.99 (pictured, low by $17)
Use some marketing and merchandising tricks to make more money with less sweat.