Amazon offers Prime members the Urban Armor Gear Case for iPhone 6 in Black, model no. UAG-IPH6PLS-BLK-VP, for $18.99 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.16.) That's the lowest total price we could find by $2. It features an HD screen protector and an impact-resistant soft core, and it purportedly meets military drop-test standards.