newegg offers the Cooler Master Excalibur 120mm Case Fan
in Black, model no. R4-EXBB-20PK-R0, for $17.99. This $10 mail-in rebate
cuts it to $7.99
. With free shipping
, that's the lowest total price we could find by $7, although it was $4 less in October. It features a maximum speed of 2,000 rpm. Rebate expires January 31.