Amazon has the Oakley Men's Latch Squared Sunglasses (Matte Olive Ink w/ Emerald Iridium) for $45 with free shipping. Features durable and lightweight acetate frames, integrated hinge mechanism, iridium lens coating reduces glare and balances light transmissions.
Has excellent Amazon Reviews.
eBay has the Ray-Ban Andy Men's Polarized Flash Sunglasses (Blue Flash, RB4202-710/9R-55) for $75 with free shipping. Retail price: $163.
Ends 10/21. Reebok is offering 40% Off Outlet Items with coupon OCT40. Shipping is free with the same code.