Refurb for Less via eBay offers the refurbished 1.8-lb. Asus Transformer Mini Intel Atom 1.44GHz 10.1" Touchscreen 2-in-1 Laptop [ebay.com]
in Gray for $154.99 with free shipping. (It's the best deal by $79 for a refurb today.)
It functions as a laptop or tablet and features an Intel Cherry Trail Atom x5-Z8350 1.44GHz quad-core processor, 10.1" 1280x800 LED-backlit touchscreen LCD, 4GB RAM, 64GB eMMC storage, 802.11ac wireless, detachable keyboard, built-in kickstand, 2-cell battery, and Windows 10 Home 64-bit. It comes with a stylus pen.
Note: A 90-day warranty applies, but it's not clear who it's provided by.