Three versions of the 7" Amazon Kindle Fire HD, including the newest quad-core powered model, the Kindle Fire HDX, are marked down by up to $30 at BestBuy.com. This sale has the best price we could find for the 8GB Kindle Fire HD by $15 and by $10 for the 16GB Version. However, the best pick would be the $199.99, 16GB Kindle Fire HDX that becomes the best price we could find for it by $30. It has a 7" HD display with a 2.2GHz quad-core processor, 2GB of memory, and a battery life of up to 17 hours while reading eBooks, watching movies, surfing the web or playing games. The shipping is free on all orders and orders placed before 3 p.m. ET, Friday, December 20th, are guaranteed to arrive before Christmas. Sales tax is charged in most states.