A variety of eBay sellers cut up to 70% off athletic shoes, with prices starting from $19.99. Plus, many items are eligible for free shipping. Choose from brands like Nike, PUMA, and adidas. Deal ends March 9. Some best bets: Reebok Women's One Cushion Running Shoes for $44.99 (low by $17) Nike Men's Flight '13 Leather Sneakers for $52.99 (pictured, low by $19)