Choosesmart via eBay offers the Nike Men's Run X2 Ph Max Transitions Speed Tint Sunglasses
, model no. EV0798-070, for $39.99
with free shipping
. That's the lowest total price we could find by $50. They feature an adjustable silicone nose bridge, interchangeable lenses, and 100% UVA/UVB protection. A hard case and cleaning cloth are included.