Art3D via Walmart offers its Art3d 12" x 12" Peel and Stick Kitchen / Bathroom Backsplash Tile in Multicolor for $5.99 with free shipping. That's $3 off and tied with our mention from two weeks ago as the lowest price we could find. It's resistant to the heat of stove tops and the humidity of bathrooms.
Buying more than one? Art3D offers a 6-Pack for $29.99 and 10-Pack for $44.99, each with free shipping.