I'm trading in a 3 year old Samsung Galaxy SII Epic Touch (the one with wimax, not LTE). Had to get a new battery ($7 bucks on amazon) for it but worth it. It only has a $9 trade in value I think.
When I got my note 2 I traded in an old LG Lotus phone. Though they require a smart phone now.
$100 out of pocket isn't bad, as you can use the $200 gift card towards the purchase.