Best Buy offers the APS Back-UPS 450VA 8-Outlet Battery Back-Up UPS, model no. BE450G, for $24.99 with free shipping. That's the lowest total price we could find by $25 and the least expensive APC UPS we've seen. It features four battery-backup outlets and four surge-only outlets, as well as a RJ-11 analog phone line protector.

Update: It's sold out for delivery, but it can be ordered for site-to-store pickup.