Woot offers the open-box 3.4-lb. Toshiba Satellite U925T-S2120 Intel Ivy Bridge Core i5 1.8GHz 12.5" Convertible Ultrabook in Brown, model no. PSUL1U-01H008, for $509.99 plus $5 for shipping. That's $65 under our mention of a refurb from November and the lowest total price we've seen for this model. (It's also $400 below the best price we could find for a new one.) This ultrabook converts into a tablet and features an Intel Core i5-3337U 1.8GHz Ivy Bridge dual-core processor, 12.5" 1366x768 IPS touchscreen LED-backlit LCD with Gorilla Glass, 4GB RAM, 128GB SSD, 802.11n wireless, USB 3.0, media card reader, 3-cell battery, and Windows 8 64-bit. (No optical drive is included.) Deal ends May 8.

Note: A 30-day Woot warranty applies.