Right now on Amazon you can grab this CaseCrown Bold Standby Case (Red) for Amazon Kindle Fire HD 7 Inch (Built-in magnet for sleep / wake feature)  for only $3.99!
This case has great reviews. It comes it several different colors including black, orange, green, blue, purple, and red.
It ships FREE with Super Saver Shipping or Amazon Prime.
Thanks Swag Grabber !