Looking for: C64 Last Ninja 2 - Activision

Hi.

I am looking for the C64 version of Last Ninja 2 by Activision. If a take a look at the rarity guide it should be a common game and worth $15 NIB.

I have been watching Ebay for ages but never saw it popping up there. I also expected the game to be worth much more than $15. What would beside Ebay be the best place to look for this game? Or is there somebody over here that owns a copy of this game that is only catching dust and looking for a new owner :D

Hope someone can point me in the right direction.

Thanks.