MegaMacs offers the refurbished Apple iMac Intel Core 2 Duo 2.16GHz 24" Desktop, model no. MA456LL/A, for $529.99 plus around $21 for shipping. That's $20 under our mention from two weeks ago and the lowest total price we've ever seen. (It's a current price low for a refurb by $126.) It features an Intel Core 2 Duo T7400 2.16GHz dual-core processor, 24" 1920x1200 widescreen LCD, 1GB RAM, 250GB 7200 rpm hard drive, DVD burner, NVIDIA GeForce 7300 GT 128MB graphics, 802.11n wireless, Bluetooth, iSight webcam, and Mac OS X 10.6 Snow Leopard. Deal ends May 16.

Note: A 30-day MegaMacs warranty applies.