Apple yesterday unveiled its new iMacs during a special event at the company's campus in Cupertino, driving down the value of its other slightly older iMac models available online. Apple's refurbished 17-inch 2.0GHz Intel Core 2 Duo iMac is priced at $849, and comes with 1GB of memory alongside a 160GB hard drive. Apple's reconditioned 20-inch 2.16
