Newegg offers the Thermaltake Core P3 SE ATX Open-Frame Computer Case in Black for $89.99. Redeem this $25 mail-in rebate to cut the price to $64.99. With free shipping, that's the lowest price we could find by $35. It features four internal 3.5" drive bays, eight expansion slots, and space for three 120mm or 140mm fans. Deal ends July 31.