newegg offers the Cooler Master 120mm Case Fan, model no. R4-C2R-20AC-GP, for $7.99. This $5 mail-in rebate cuts it to $2.99. With free shipping, that's the lowest total price we could find by $5, although we saw it for a buck less last winter. It runs at 2,000 rpm and delivers up to 69 CFM of air flow. Rebate expire August 5.