MegaMacs offers the refurbished Apple iMac Intel Core 2 Duo 3.06GHz 21.5" Desktop, model no. MC413LL/A, for $599.99 with free shipping. That's $24 under last month's mention and the best price we've seen for this model. (It's also $81 under the best price we could find for a refurb elsewhere.) This iMac features an Intel Core 2 Duo E7600 3.06GHz dual-core processor, 21.5" 1920x1080 (1080p) LCD, 4GB RAM, 1TB hard drive, SuperDrive, Bluetooth 2.1+EDR, AirPort Extreme, and OS X 10.9 Mavericks. A 90-day MegaMacs warranty applies. Deal ends August 20.