These units are usually impossible to tell from brand new (although the Keyboard unit often doesn't ship with the wall charger, buy you can pick one up for under $10 or just charge via your computer) and come with the same warranty from Amazon. You generally can't get the Amazon extended warranty on their refurbished units, but Square Trade has traditionally let you get them thru them (although I generally recommend against getting them on items like these that are relatively inexpensive and often end up getting replaced by newer technology after a couple of years).
Deal Description
Save $30 on a Certified Refurbished Kindle Fire. Each Certified Refurbished Kindle Fire is a pre-owned Kindle Fire that has been refurbished, tested, and is certified to look and work like new. They come with the same one-year limited warranty as a brand-new Kindle Fire. Kindle Fire: great for web, movies, apps, games, and more.
This offer is valid today only, March 29, 2012, when sold by Warehouse Deals. Offer good while supplies last.
Limit 5 per customer.