Wario Land II [Not for Resale] GameBoy

Back in the day, many video game stores such as Wal-Mart and Toy's R' US had kiosks set up in their stores. These allowed gamers to try out games before they bought them. These store kiosk Nintendo 64 games are known as the Not For Resale carts. You'll always know what a Not For Resale cart looks like because it will have the text "Not For Resale" written on it. Some would also have a sticker on the back of the cartridge for the store to fill out.

Not For Resale cartridges are extra special because once the store was done with them, the cartridges were supposed to be returned to Nintendo or thrown out. Many have survived and have become collector's items.