Expercom offers the refurbished Apple iMac Core i7 2.8GHz 21.5" Desktop, model no. MC812LL/A, for $599 plus $22 for shipping. That's $168 under the lowest total price we could find for a base-model refurb (with an i5 CPU and half as much RAM) elsewhere and the best deal we've seen for this model in any configuration. It features an Intel Core i7 2.8GHz quad-core processor, 21.5" 1920x1080 (1080p) LCD, 8GB RAM, 1TB hard drive, ATI Radeon HD 6770M 512MB graphics, DVD burner, Airport card (802.11n wireless), Bluetooth, and macOS Sierra. Deal ends October 24.

A 90-day Expercom warranty applies.