On Amazon: 30% off 1 item offer & free shipping with Amazon Prime.
iUniker Raspberry Pi 3 Case, Raspberry Pi Fan ABS Case With Cooling Fan, Raspberry Pi Heatsink, Simple Removable Top Cover for Pi 3 Model B, Pi 2 Model B, Pi Model B+ (Black/White) by iUniker
Black Case [amazon.com]
White Case [amazon.com]
Add item to cart, there will be a promotional discount of $3.30 available at the payment fields.
Discount is only usable once.
If you get one of each case, the discount total will be $6.59
Item does show a 5% coupon checkbox also, but, the 30% off coupon overrides the discount.