NCIX offers the Antec Eleven Hundred Steel ATX Mid Tower Computer Case for $42.98 plus around $16 for shipping. That's the lowest total price we could find by $51. This case features three external 5.25" bays, six internal 3.5" bays, one 120mm rear fan, one 200mm exhaust fan, two USB 3.0 front-side ports, two front-side USB 2.0 ports, and more.

Update: Note that this item is currently backordered, but can still be ordered at this price for delivery when available.