Buy.com cuts the price of the 18.5" Compaq Presario CQ1-1225 BT424AA 18.5" All-in-One Desktop PC from $646 to $339.99 with free shipping. Plus, new Buy.com customers can click this link and click "Redeem" to activate $15 savings. That is almost 1/2 off and the lowest price we found anywhere by $23. This entry-level computer has an Intel Atom D525 processor, 2GB of system memory, and a 320GB hard drive. With the included mouse and keyboard, you have everything you need to get started. There is no sales tax (except CA, MA, MD, NY, IL and TN).