I just got an email from Picture it on Canvas.
Coasters, Cutting boards & Mousepads are all 70% off when you use coupon code: hodgepodge
The coasters work out to 7.50 which is a great deal for a customized set of four. (You can add a stand to your order for 5$ but I'm not sure if they discount the stands)
Picture It On Canvas: Coasters - Set of 4