Amazon offers Prime members the Rosewill Micro ATX Mini Tower Computer Case
in Black, model no. RANGER-M, for $19.99
with free shipping
. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $13.22.) That's the lowest total price we could find b $10. It features two internal 3.5" drive bays, two external 5.25" drive bays, one external 3.5" drive bay, four expansion slots, an 80mm rear fan, and 120mm front fan.