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Buy.com has this HP Pavilion Desktop for $499.99 with free budget shipping, the lowest price we could find by $132. This desktop is extremely powerful as it features AMD's Phenom II quad core processor along with 6GB of RAM , so it can handle even the most taxing programs without lag or freezing. Note that it does not include a monitor. Sales tax is only charged in CA, MA, MD, NY, and TN.