Idealpoint via Amazon offers the New Trent Alixo Rugged Transparent Case for iPhone 6, model no. NT636TR-S, for $21.95. Coupon code "CLEARTRS" cuts the price to $9.95. Plus, Prime members bag free shipping. (Non-members can get free shipping with orders of $35 or more; otherwise, shipping adds $6.01.) That's the lowest total price we could find by $20. It features black and white interchangeable front covers with built-in screen protectors and is scratch resistant, shock proof, and dirt proof.

It's also available for the iPhone 6 Plus, model no. NT636TR-L, for the same price via coupon code "CLEARTRL".