Newegg offers the refurbished Cooler Master 95mm Rifle CPU Fan, model no. DP6-9EDSA-0L-GP, for $7. Redeem this $7 mail-in rebate to cut that to $0. With free shipping, that's a buck under last month's mention and the best price we've seen. (It's also $12 under the lowest total price we could find for it new.) It's compatible with Intel LGA 1150/1155/1156. Deal ends January 4.
Note: A 90-day warranty applies, although it's unclear who backs it.