Juka and the Monophonic Menace GBA - Sealed

[Tanooki]

I found this game earlier today and I was surprised to see it as it rarely if ever pops up on ebay much as it was a late post-DS release and unique too. I can only find one record at $29~ shipped, it was a BIN someone picked off quick for another sealed new. Another that was supposedly NEW but not sealed 3 months earlier did the same the same way too on ebay.

Is there any good way to determine a value on this thing at all and if not what would be the advice on selling it? I know for what I paid I could easily open it up and not take a loss playing it keeping it pretty then selling if it I don't like it, but the unknown factor bugs me.

The seal is legit, not a dent or scratch on the box and the seal itself has no a rip to it or stretch anywhere from wear/abuse, just the usual scrunching along the edges of the box from it being on there tightly for years. If pictures are wanted I can do that.

[atarikurt]

It rarely shows up but when it does the seller tends to have a bunch of sealed copies. I bought one last summer off Ebay sealed for around $15 if I remember correctly. I figured it was pretty rare too but I ended up opening up mine and playing it.

[Gameguy]

I can't believe this is rare, I remember seeing new copies of this all the time in Walmart back when they still carried GBA stuff.

For a record of selling prices check the link below.
http://videogames.pricecharting.com/game/gameboy-advance/juka-and-the-monophonic-menace

[Tanooki]

I was looking at that site over ebay since it basically pulls the listings there, but almost all of it is quite out of date which is why I asked. I wasn't thinking this was some $50 game, but I was wondering if it was more like a $20, $30 or something dollar game.

If it's barely going to get and not clear $20 I may just open it up as it looks pretty unique.