$30 trade-in credit for old cameras at Office Depot (April 11-24)

As part of the Earth Day festivities, Office Depot brick and mortar stores will be having trade-in promotions. One of them is for digital cameras - a $30 trade-in credit when you buy a $150+ new camera, while trading in a functional 5mp+ camera with a working rechargeable battery. As usual, be sure to check market prices and eBay used prices. It may be a reasonable amount for a basic P&S if you don't want the hassle of eBay/Craiglist but if you have a more advanced camera, you can probably get a lot more than $30.