Newegg offers the Rosewill Challenger S ATX Mid-Tower Gaming Computer Case in Black for $29.99 with free shipping via the directions below. That's the lowest total price we could find by $20. This steel case features three internal 3.5" bays, two internal 2.5" bays, two external 3.5" bays, seven expansion slots, one USB 3.0 front port, two USB 2.0 rear ports, and three 120mm fans. Deal ends March 31. To get this price:

1. Add the Rosewill Challenger S ATX Mid-Tower Gaming Computer Case to your cart for $49.99
2. apply coupon code "EMCEHHE25" to drop that to $39.99
3. redeem this $10 mail-in rebate for a final price of $29.99