Jomashop is offering Up To 53% Off Select Oakley Sunglasses. Also get an extra $10 off with coupon DNEWSOAK10. Shipping is free with the same code. Some of the favorites with prices after coupon:
REI is offering Up To 85% Off Clearance Items. Shipping adds $5.99 or get free shipping on orders of $50+; free in-store pickup available for most items. Items include apparel, shoes, camping and outdoor items, sunglasses, and backpacks.
Amazon has the LVXING LVX548 Polarized Sunglasses w/ 5 Lensess (Red for $21 with free shipping on $25+ or with Prime. List price: $35. Features frame are durable and lightweight, includes 5 interchangeable lenses to fit your needs.
Has good Amazon Reviews.