Quoted from egyptrus:

I've been noticing more and more lately that folks seem to think that they have to get out of their game what they have into it. Sorry, it just doesn't work that way. If you over paid for a game (not saying you did, just an example) there's no reason to expect that someone else is also going to over pay when you sell your game.
As is always the case, the game is worth what someone is willing to pay for it and the higher you go above normal, the smaller the available group of buyers will be. If you're cool with that and are hoping to find the one guy that wants to spend $8k on it, good for you. In the meantime, because you're so far above what normal is for this title, you might have to put up with those who have a different opinion regarding its value.