RefurbforLess via eBay offers the Intel Kaby Lake Core i7-7700K 4.2GHz Quad-Core LGA 1151 Processor for $299.99 with free shipping. That's $10 under our mention from three weeks ago and the lowest price we've seen. (It's also the best deal we could find today by $39.) It features 8MB of cache memory.

Update: As a reader noted, if you have a nearby location, Micro Center has it for the same price via in-store pickup.