adidas offers its adidas Men's Response Boost Running Shoes in four colors for $69.99. Coupon code "BOOST" cut them to $59.49. With free shipping, that's the lowest total price we could find by $29. They're available in sizes 6.5 to 15; however, not all sizes are available in all colors.
Of note, the women's version is also available for $59.49 via the above coupon with free shipping, another price low by $29.