This deal has ended.
When Shoebuy has a large coupon they are one of the best places to buy shoes. And through tonight they do (use code MOTHERSDAY08 to take 20% off any order. They don't carry Nike but they price other brands very well. For example, the New Balance 992 running shoes for men or women are just $95.16 after the code plus free shipping and no sales tax too. This is the only store under $100 (they retail for $130-$140 and are $135 at this New Balance site). Also of note: return shipping is free at Shoebuy so don't worry about sizing, just buy 2!