MegaMacs offers the refurbished Apple iMac Intel Core i5 2.66GHz 27" Desktop, model no. MB953LL/A, for $829.99 plus around $34 for shipping. That's $221 less than our April mention and the lowest total price we've seen. (It's a current low for a refurb by $46.) Features include an Intel Core i5 2.66GHz processor, 27" LED-backlit glass display, 4GB RAM, 1TB hard drive, Radeon HD 5670 512MB graphics, AirPort Extreme (802.11n), iSight camera, Bluetooth, Magic Mouse, wireless keyboard, and OS X 10.9 Mavericks. (No system disc is included.) Deal ends September 16.

A 30-day MegaMacs warranty applies.