You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
If it was Tetris or a Limited Edition game i'd keep it as a collectible. if it was any other game i'd try and sell it or trade it in, given you're actually able to get good money for it. or if you have a friend try and swap out different games you both want in exchange for the other. that's really all you can do and what i'd recommend! lol.
"OldSchoolGaming4Life" on YT & CAG/"90sRetroGaming" on mariokartwii.com
You can always keep it - since there's no account system, if your 3DS is lost, stolen, sent in for repairs, or for whatever reason you lose your digital copy and can't redownload the game... you have a backup.
Not that I'm against selling the game, but it can potentially be hard to find a good deal, and... I'm paranoid. :D