REI takes up to 66% off a selection of electronics, watches, backpacks, and accessories. Choose in-store pickup when available to avoid the $5.99 shipping fee, or spend $50 or more to qualify for free shipping. (Many items have shipping restrictions that prevent in-store pickup.) A couple of best bets:
Shnoop offers the Oakley Men's Tailpin Aviator Sunglasses in Satin Black/Grey, model no. OO4086-09, for $79.99. Coupon code "5KHPW44M" drops them to $69.99. With free shipping, that's the lowest total price we could find by $28. They feature C-5 alloy frames and 100% UV protection.