Blinq via eBay offers the open-box Dell Inspiron Intel Pentium 2.5GHz Touchscreen All-in-One 20" Desktop PC, model no. io2020-4668BK, for $399.99 with free shipping. That's $150 off and the lowest total price we could find. It features an Intel Pentium G645T 2.5GHz dual-core processor, 20" 1600x900 touchscreen LED LCD, 4GB RAM, 500GB hard drive, DVD burner, 802.11n wireless, webcam, and Windows 8.

Note: A 90-day Blinq warranty applies.