Apple is offering several refurbished iMacs, both new and old generation, starting from $999. The white plastic iMac models offered are the 20-inch 2.16GHz and 24-inch 2.16GHz versions, both of which come with 1GB of memory, and a 250GB hard drive. While the 20-inch model features an ATI Radeon X1600 graphics processor with 128MB of texture memory,