JemJem offers the refurbished 5.4-lb. Apple MacBook Pro Intel Core 2 Duo 2.66GHz 13.3" Laptop, model no. MC375LL/A, for $549 with free shipping. That's $178 below the best price we could find for a used unit. It features an Intel Core 2 Duo 2.66GHz dual-core processor, 13.3" 1280x800 LED-backlit LCD, 4GB RAM, 320GB hard drive, SuperDrive, NVIDIA GeForce 320M 256MB graphics, AirPort Extreme (802.11n wireless), Bluetooth, Gigabit Ethernet, iSight webcam, media card reader, and Mac OS 10.6 Snow Leopard.

A 90-day JemJem warranty applies.