Newegg offers the Cooler Master Hyper 212 Plus CPU Cooler, model no. RR-B10-212P-G1, for $29.99. This $10 mail-in rebate cuts the price to $19.99. With free shipping, that's the lowest total price we could find by $10, although it was $5 less in September. It fits Intel 1366, 1156, and 775 sockets, plus AMD sockets AM3, AM2+, and AM2. Deal ends March 30.