Acer via eBay offers the factory-refurbished 5.3-lb. Acer Aspire Intel Haswell Core i5 1.6GHz 15.6" Touchscreen Laptop, model no. R7-572-6423, for $649.99 with free shipping. That's $100 under last week's mention of a new unit and $149 under the lowest total price we could find for a new unit elsewhere. Usable as a notebook or a tablet, it includes an Intel Haswell Core i5-4200U 1.6GHz quad-core processor, 15.6" 1920x1080 (1080p) LED-backlit touchscreen LCD, 8GB RAM, 1TB hard drive, 802.11n wireless, Bluetooth, HDMI, USB 3.0, 4-cell battery, and Windows 8 64-bit. No optical drive is included. A 90-day Acer warranty applies.