Todd’s Electronics and Fitness Spot through eBay has the Twelve South BookBook Case for iPhone 4 and 4S for $19 (59.99 – 40.99 instant savings) with Free Shipping for a limited time. Deal expires March 11, 2012 or while supplies last.

Twelve South BookBook for iPhone 4 and 4S holds your iPhone, your ID, debit/credit card, and cash so you’ll have everything in one place when you’re out and about. With the look of a tiny vintage book, BookBook is a high-quality leather case that’s hand-distressed to give each one a unique finish.