Backcountry offers the Ray-Ban Men's RB4222 Sunglasses in Violet/Gunmetal for $49.98 plus $5.95 for shipping. (Orders of $50 or more qualify for free 2-day shipping.) That's the lowest price we could find by $14. They feature 100% UV protection.
aSavings via eBay offers the Ray-Ban Men's Justin Sunglasses in Black/Gray for $61.99 with free shipping. That's the lowest price we could find by $20, although we saw these for $2 less in January. They feature UVA and UVB protection.