MegaMacs offers the refurbished Apple iMac Intel Core 2 Duo Dual-Core 2.4GHz 20" Desktop, model no. MA877LL/A, for $599.99 plus around $31 for shipping. That's $22 below our mention from three weeks ago for a refurb with a 320GB hard drive and the lowest total price we could find for this configuration. Features include an Intel Core 2 Duo 2.4GHz dual-core processor, 20" 1680x1050 widescreen LCD, 1GB RAM, 250GB 7200 rpm hard drive, Bluetooth 2.0+EDR, 802.11n wireless, iSight webcam, and more. Offer ends April 4.

A 30-day MegaMacs warranty applies. Also, an OS is installed on this system, but it's unclear which OS it is.