Newegg offers the Raidmax Exo ATX Mid-Tower Computer Case in Black/Green, model no. ATX-108BG, for $29.99. Redeem this $15 mail-in rebate to cut the price to $14.99. With free shipping, that's $25 off list and the lowest total price we could find. It includes two external 5.25" drive bays, two internal 3.5" drive bays, three internal 2.5" drive bays, and a 120mm fan. Rebate expires April 18.