It's not just original iPads that are still very much in demand -- it's all tablets, past and present. According to a new report by trade-in site SellCell.com, October 2012 was the biggest month for tablet trade-ins in history, spurred by brand new tablet announcements from Google (the Nexus 10 was officially revealed), Microsoft (the long-awaited Surface saw release), and of course Apple, with the long-rumored iPad mini and fourth-genera
