Fry's Electronics offers the ASUS PadFone X mini Prepaid Smartphone w/ Tablet Transformer for AT&T for $149.99 with free shipping. Outside of the deal below, that's the lowest total price we could find by $50. It features a 4.5" 1920x1080 touchscreen that converts to a 7" tablet, Intel Atom Z2560 1.6GHz dual-core processor, 8GB RAM, 2-megapixel front-facing camera, 5-megapixel rear-facing camera, and Android 4.4 OS (KitKat).

Update: It's now available for in-store pickup only.

A close price: Walmart offers it for $158.28 with free shipping.