Purchase a Kindle Fire HD, 16GB, 7" for $149.99 plus tax by 3/3/2013. Tweet using #BuyKindleFireHD to begin your purchase with synced American Express Card. You will receive a response message from our Twitter handle @AmexSync asking you to Tweet #ConfirmKindleFireHD. After Tweeting #ConfirmKindleFireHD, you will receive a response from @AmexSync and an email from American Express confirming purchase of your Kindle Fire HD. The product will ship to your billing address on file.