Echo Store via Amazon offers the Slicoo Dual-Layer TPU Rubber Cover Case for iPhone 6 Plus in seven colors (Yellow pictured), model no. SLCS-034, for $10.99. Coupon code "V5Q9VRIH" cuts it to $5.99. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to get free shipping; otherwise it adds $6.14.) That's $24 off list and the lowest total price we could find.