PC Micro Store offers the rooCASE Wave TPU Crystal Skin Diamond Design Case for AT&T Apple iPhone 4 in six colors (Blue pictured) for $6.95. Coupon code “IP4GSCRDIA” drops it to $2.50. With free shipping, that’s the lowest total price we could find by $4. It protects your iPhone from scratches, dust, and more. Coupon expires after 1,000 uses.

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