Cell.Expert via eBay offers these Men's Wrap Around Polarized Sunglasses in Black for $1.16 with free shipping. (Grey or Light Brown are available for a few cents more). That's a buck under last week's mention and the lowest total price we've seen. (It's the best deal we could find for such a pair by $3, excluding other eBay vendors.) They feature 100% UV protection.
Note: This item ships from mainland China and may take three to eight weeks to arrive.