The 8GB Barnes & Nobles Nook HD 7" Tablet drops from $129 to $79 while the 16GB version drops from $149 to $99 at Barnes & Nobles. Plus, the shipping is free. This is the best price we could find for the 8GB eReader by $50 and $45 for the 16GB. Both tablets have built-in WiFi, expandable storage with a microSD slot, can sustain up to 10.5 hours of reading or up to 9 hours while watching videos and have access to the Android app store. Sales tax is charged in most states.