Spigen Inc via Amazon has Spigen Cases for iPhone 7 and iPhone 7 Plus on sale from $2.99 as listed below. Shipping is free.

Note, you must select seller Spigen Inc not Fulfilled by Amazon to apply the promo codes and for Free Shipping. If you see fulfilled by Amazon then click "Other Sellers on Amazon" (right side of the product page below the "add to cart" box) and select the listing directly from Spigen Inc for Free Shipping. These cases are pre-orders and will be released/available Sept. 23 or later.

iPhone 7Tough Armor (Rose Gold) $3.99 w/ code 2UDZPQWHHybrid Armor (Gunmetal) $2.99 w/ code 2235SLJJHybrid Armor (Rose Gold) $2.99 w/ code MAWA8WMHFlip Armor (Gunmetal - pictured) $3.99 w/ code 3X5TJISIFlip Armor (Rose Gold) $3.99 w/ code KKQ24XOViPhone 7 PlusTough Armor (Rose Gold) $3.99 w/ code W5C7SUF8Flip Armor (Gunmetal) $3.99 w/ code 29KDBAV6Flip Armor (Rose Gold) $3.99 w/ code CL84HN2KHybrid Armor (Gunmetal) $2.99 w/ code 6H9SYJZDHybrid Armor (Rose Gold) $2.99 w/ code DYZ3UUIJ