I, too, debated this question...the thing is whent he N3 comes out, everybody and their Note mothers is going to want one and will want to get rid of their N2's, saturating the market and bringing prices down, what you should do is what i did, sell your Note 2 NOW that the prices are high, and take advantage.
I walked into the T-mobile store and asked what they would give me for my N2, and they said the trade in value was $250 (I later confirmed this myself when I went online and filled out the appraisal form). My EIP, or my installment plan balance, was $220, so I was actually in a positive equity state, where my trade-in was worth more than the balance I owed on it (Im a car salesman and this is exactly like trading in a car, basicaly my trade was worth more than my payoff hence positive equity). Leaving me with $30 to use towards the $199 I need for the phone..
So, I can trade it in for a mere $250 (it's worth more than that obviously) or I can sell it on the side and take the profits, pay off the EIP, and use the remainder for the $199 down I need. So I put it up on craigslist for $400, shooting high I know, and it had no screen protector, no case, no headphones, it had scratches on the back panel, and although the screen was not cracked or scratched, you could notice swirlies..so it wasn't mint..2 days later, I got a legit hit (after the usual paypal/western union scam "oh, i need it as a present, ill send you $550, just ship it here" yadda yadda yadda bs) and he offered $360. Sold it right there and then. $220 went to payoff balance, $140 positive equity will go towards the $199 so $50 out of pocket so yea I rocked it. You could get 400 like one of the posters here, just dont fall for anything below $300, that's just insulting, it's a note 2 for gods' sake!
So you're asking "You sold your phone you dummy! what are you going to do for 2 weeks!" I have no old phone so yea you're right, but then I thought maybe one of my coworkers has one laying around, and lo behold after asking around, someone had some pos 1.5 android phone that I can't even install ebay on lol, and since it's just sitting in their drawers, lent it to me for the next 2 weeks. Boooy let me tell you when I get the N3 it's going to look sooo huuuge, compared to comparing it to the Note 2 I had rofl, i can't wait..
But again, I stress it, my advice is sell now, before the N3 is out and the market gets flooded with N2's and yours is worth a ****ty 200-250...