Ends 11/14. Nike is offering an Up To 50% Off Select Shoes, Apparel, And Accessories as part of their Flash Sale. Shipping is free for Nike+ members (free to join).
Ends 11/21. Banana Republic is offering an Extra 40% Off Sitewide, Including Sale Items. Also get an additional 10% off. Both discounts appear in cart. Shipping adds $7, or get free shipping on orders of $50+.
Amazon has the ALKAI Griffin Sport Polarized Sunglasses (Black / Black or Gunmetal Gray for $9.99 with free shipping for Prime members or on $25+. Has excellent Amazon Reviews.