Ends 9/27. StackSocial has the Blips "World's Thinnest" Micro and Macro Smartphone Lens Kit for $25 + $3 shipping = $28 shipped. Check out the original Kickstarter campaign. Includes the Macro Plus Lens (20mm), and the Macro Lens (10x magnification).

A set that includes the Blips Ultra lens is also available for $56 shipped.