bestbuy got a promo for preordering the note 4. get a $200 best buy gift card if you trade in an old phone.
http://www.bestbuy.com/site/promo/samsung-galaxy-note-4-128435
you might have to talk to a couple people to get it because when i went in.. the guy had no idea what i was talking about. once i showed him the website, he was fine with it. he said as long as the old phone is in working condition, i'd get the gift card.
other people have said that their bb employee said OFF contract only.. other said their guy said ON contract only.
so i guess it depends
there's another promo straight from samsung that's pretty much the same thing but a little bit more of a hassle to complete. but they'll cut you a check instead of getting a gift card.
https://samsunggalaxypromotions.com/Note4/