Microsoft Store continues to offer the 4.95-lb. ASUS Transformer Book Flip Intel Haswell Core i5 1.7GHz 15.6" 1080p Convertible Touchscreen Laptop, model no. TP500L-UB51T, for $649 with free shipping. That's tied with our mention from three weeks ago as the lowest total price we've seen for this laptop. (It's a current price low by $51.) It converts into a touchscreen tablet and features an Intel Haswell Core i5-4210U 1.7GHz dual-core processor, 15.6" 1920x1080 (1080p) LED-backlit touchscreen LCD, 8GB RAM, 1TB hard drive, 802.11n wireless, webcam, Bluetooth, USB 3.0, 3-cell battery, and Windows 8.1 64-bit. (No optical drive is included.)