Today at Apple's online store save on a wide selection of refurbished Macs, now starting as low as $739 for a Mac mini, originally released in late 2009, it features a 2.53GHz Intel Core 2 Duo processor, 4GB of RAM and dual 500GB hard drives. For only $10 more ($749) get a newer Mac mini with Snow Leopard Server, a 2.66GHz Intel Core 2 Duo processor, 4GB of RAM and dual 500GB hard drives.
