newegg offers the Topower ATX Mid Tower Computer Case
, model no. TP-4106BB, for $19.99
with free shipping
. That's $3 under the lowest total price we could find for any ATX mid tower case. It features four external 5.25" drive bays, two external 3.5" drive bays, five internal 3.5" drive bays, seven expansion slots, one 90mm fan, and more.