iMac 21.5" 2 yrs old $600 OBO

Selling my 2 yr old iMac in good condition not heavily used. The following are the machine specs:

Processor - 3.3 GHz Intel Core i3
Memory - 4 GB 1600 MHz DDR3
Graphics - Intel HD Graphics 4000 1536 MB
Hard drive - 500 GB SATA Disk

Also comes with accessories: keyboard, magic mouse, magic trackpad.
Can be picked up at Stanford with the original packing.