GameStop has long been one of the biggest in the trade in game and this weekend, you may be in for quite the bonus. This is definitely a case of where it depends on your location, but your local store may be offering a 50% bonus, before the 10% PowerUp Rewards bonus, on all game trade ins, without the need for a pre-order.
For some reason, this is limited to certain GameStop stores, but multiple in my area showed up when I used the specialized store location for this promotion, which you can find here. Even if your store does show up, it may be worth your while to call ahead, just in case it is a mistake before you make a long drive. This promotion will last through tomorrow, April 20, so get into your stores soon.