For in-store pickup only, Micro Center offers the Intel Kaby Lake Core i7-7700K 4.2GHz Quad-Core LGA 1151 Processor, model no. BX80677I77700K, for $299.99. That's $10 under our mention from two weeks ago, the best deal we could find today by $49, and the lowest price we've seen. It features 8MB of cache memory.
Of note, Micro Center pictures the i7-7700. The i7-7700K does not come bundled with a CPU cooler.