Lenovo offers the 3.2-lb. Lenovo IdeaPad Yoga 11 Intel Celeron 2GHz 11.6" Convertible Touchscreen Laptop in Black, model no. 59416645, for $499. Coupon code "YOGA4EMAIL" drops it to $449. With free shipping, that's $200 off list and the lowest total price we could find. The laptop converts into a touchscreen tablet and features an Intel Celeron N2920 2GHz quad-core processor, 11.6" 1366x768 touchscreen LCD, 4GB RAM, 500GB SSD, 802.11n wireless, Bluetooth 4.0, webcam, media card reader, 4-cell battery, and Windows 8.1 64-bit.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.