adidas via eBay takes up to 60% off a selection of its adidas men's, women's, and kids' apparel and shoes. (Prices are as marked.) Plus, these orders receive free shipping. A couple of best bets:
adidas Men's Cloudfoam Ilation Mid 2.0 Shoes for $29.99 (pictured, low by $5)
adidas Women's EQT Support ADV Primeknit Shoes for $59.99 (low by $10)
With these companies, it might be easier than you think to negotiate your monthly bill down.