Vistaprint offers a Custom Case for Apple iPhone 4, 4S, or 5 bundled with a $5 credit on a future purchase for $9.99 plus around $4 for shipping. (The credit will be noted during checkout. You'll receive an email detailing how to redeem the credit.) That ties our mention from two weeks ago and, assuming you use the credit, it's $17 under the lowest total price we could find for a similar custom iPhone case sold elsewhere. You can add text to existing designs or upload your own photo.