Dretal Rugged Armor Shell ($6)
If you're looking for a basic all-around champ for a case, consider the Dretal Rugged Armor. It's a blatant rip-off on the popular style of case from Spigen, but it still does a great job at an affordable price.
The entire case is made from a smooth yet textured and durable soft-touch TPU material. This is flexible and easy to install while remaining tough. They use glossy accents on the sides and corners, and a faux carbon fiber on top for added stylish good looks. Each corner has little gaps of air for extra drop-protection, and the TPU shell absorbs any other force from drops or damage. It's a decent little case for those on a budget.