MegaMacs offers the refurbished Apple iMac Intel Core 2 Duo 2.4GHz 20" Desktop, model no. MA877LL/A, for $549.99 plus around $31 for shipping. That's $50 under our March mention and the lowest total price we've seen 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, SuperDrive, ATI Radeon HD 2400 XT 128GB graphics, Bluetooth 2.0+EDR, 802.11n wireless, iSight webcam, and Mac OS X 10.6 Snow Leopard. Deal ends May 16.

Note: A 30-day MegaMacs warranty applies.