Spigen Inc via Amazon offers the Spigen Slim Armor Case for iPhone 6 in Gunmetal for $16.76. Coupon code "LN6HVH34" cuts the price to $9.99. With free shipping, that's the lowest total price we could find by $10. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $6.19.) It features dual layer protection. Deal ends today.