Micro Center offers the Acer Aspire ATC-780A-UR12 Intel Kaby Lake Core i5 3GHz Desktop PC, model no. DT.B7YAA.002, for $389.99. Choose in-store pickup to avoid the $28.10 shipping fee. That's the lowest price we could find by $137, outside the below offer. It features an Intel Core i5-7400 3GHz Kaby Lake quad-core processor, 8GB RAM, 1TB 7200 rpm hard drive, DVD burner, 802.11ac wireless, Gigabit Ethernet, Bluetooth 4.0, HDMI, USB 3.1, and Windows 10 Home.
Don't live near a Micro Center? Newegg offers it for $399.99 with free shipping.