Best Buy has the APC BE550G 550VA 330w Battery Back-Up System for $40 with free shipping.
Product Features:
* 365-joule rating
Absorbs a high quantity of energy for improved performance.
* 550VA (330W) capacity with up to 65 minutes of battery backup time
For safe system shutdown when power is lost.
* 8 outlets (4 battery backup/surge protection and 4 surge protection-only)
Along with phone, fax, modem and DSL protection and USB connectivity help protect your computer and peripherals from power surges and spikes.
* Visual and audible alarms
Inform you in the event of power surges, spikes, outages and other power events.
* High-efficiency charger
For reduced energy consumption.
* 5' cord with NEMA 5-15P right-angle plug
Allows easy room placement.
* APC $75,000 equipment protection policy.
* Safe Shutdown software included
For added equipment safety.
APC - 550VA Battery Back-Up System - Black - BE550G
(Updated) APC BE550G 550VA 330w Battery Back-Up System $40 
