Back in the early days of computing, cavemen would build their PCs inside of stone enclosures. They needed to use stone because it was the most popular material at the time, and also to protect from saber-toothed tigers who delighted in the taste of silicon. Fast forward to today and we no longer need to worry about saber-toothed tigers stealing our components, so it's increasingly difficult to find a case made out of stone. Instead, we have much fancier enclosures, such today's top deal for a Corsair Carbide Series 500R Mid-Tower for $80 with free shipping (normally $110 - use coupon code: [EMCPGHE36]; additional $20 mail-in-rebate). It's made of steel with molded ABS plastic accents. A single 200mm fan and three 120mm fans are included to keep your components breathing, and if you need more, there are a total of 10 fan mounts.