Jet.com offers the NZXT S340 Steel ATX Mid Tower Case in Black, model no. CA-S340W-B1, for $66.24 with free shipping. That's the lowest total price we could find by $4, although we saw it for $6 in April via rebate hassles. Features include two internal 3.5" drive bays, two internal 2.5" drive bays, space for up to two 140mm fans, plus space for another 120mm fan (two 120mm fans included).
Note: You can also receive additional discounts during checkout by waiving free returns or by choosing select payment options.