Today only, All4Cellular offers the Ventev UltraTHIN Hard Shell Case for iPhone 4 in Blue for $1.99 plus $2 for shipping. That ties our mention from two weeks ago as the lowest total price we could find by $6. This razor-thin plastic shell snaps on to your iPhone 4 to protect the back from bumps and scratches.

Also available is the Ventev VersaDUO His Interchangeable Shell for iPhone 4 for $1.95 with $2 for shipping. That's a few cents over our mention from two weeks ago but the lowest total price we could find by a buck. It includes three interchangeable color plates in red, blue, and silver.