MicroCenter.com has it for $280
with free in-store pickup only.
Today only. Newegg
has the Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) 4 x 256KB LGA 1155 95W Quad-Core Desktop Processor (BX80623I72600K) for $330
with free shipping. This 95W 32nm CPU features 8MB of L3 Cache, Hyper-threading, and a 3.8GHz clock speed.