Adorama via eBay offers the refurbished 3.8-lb. Lenovo Flex 4 Intel Skylake Core i5 2.3GHz 14" 1080p 2-in-1 Touchscreen Laptop in Black, model no. 80KA0006US, for $419.99 with free shipping. That's $10 below our refurb mention from last month, the best price for a refurb now by $130, and the lowest total price we've seen for a Flex 4 with this configuration. It functions as a laptop or tablet and features an Intel Core i5-6200U 2.3GHz Skylake dual-core processor, 14" 1920x1080 (1080p) IPS LED-backlit touchscreen LCD, 8GB RAM, 256GB SSD, AMD Radeon R5 M430 2GB graphics, 802.11ac wireless, Gigabit Ethernet, Bluetooth 4.0, backlit keyboard, HDMI, 3-cell battery, and Windows 10 Home 64-bit.
A 90-day warranty applies, although it's unclear who backs it.