MegaMacs offers the refurbished Apple iMac Intel Core i3 3.06GHz 21.5" 1080p Desktop, model no. MC508LL/A, for $549.99 plus around $33 for shipping. That's tied with our mention from last week as the lowest total price we've seen for a refurb. (It's also $109 under the best price we could find for a refurb elsewhere.) This iMac features an Intel Core i3-540 3.06GHz dual-core processor, 21.5" 1920x1080 (1080p) LCD, 8GB RAM, 500GB hard drive, ATI Radeon HD 4670 256MB graphics card, SuperDrive DVD Burner, AirPort Extreme (802.11n wireless), Bluetooth 2.1+EDR, iSight webcam, wireless keyboard and mouse, and Mac OS X 10.10 Yosemite. Deal ends October 6.

Note: A 30-day MegaMacs warranty applies.