Groupon cuts up to 67% off a selection of Ray-Ban unisex sunglasses, as listed below. Plus, take an extra 10% off via coupon code "SALE3". That beats our mention from two days ago, which lacked the extra discount. Plus, all orders bag free shipping. Deal ends May 20. The sunglasses, with prices after coupon:

• Ray-Ban Unisex RB4242 76430 Red/Silver Sunglasses for $71.99 (pictured, low by $8)
• Ray-Ban Unisex RB4199 601/71 Black/Green Sunglasses for $80.99 (low by $9)
• Ray-Ban Unisex RB4224 646/55 Silver/Mirror Sunglasses for $89.99 (low by $8)
• Ray-Ban Unisex RB4207 601S9A Black/Grey Sunglasses for $89.99 (low by $8)