Now you can buy used and still give money to Nintendo!
The Nintendo Online Store is now selling refurbished Nintendo 3DS and Nintendo DSi XL systems.
Currently, Aqua Blue and Midnight Purple 3DS systems sell for $129.99 standalone or $169.98 with a copy of Ocarina of Time 3D. Metallic Rose and Midnight Blue DSi XL systems go for $99.99 or $129.98 with a copy of Mario Kart DS. All of the products come with a one year warranty.
You can find these and other Nintendo products here at the Nintendo Online Store.