Keep it for a while. If it's really a space issue, sell something else, or put something else in storage. Play the crap out of it and if you don't like it, then sell it. At least that way you can honestly say it wasn't for you and it's time to move on.
Not trying to be a dick or anything, but as a casual observer I think you're missing the point. You've been chasing this game for a year. You finally get it. And less than a day goes by and you're talking about selling it. That says flipper to me. Just as an outsider looking in, mind you.
That said, the previous owner agreed to a price and you paid him. It's your game and you have every right to do whatever you want with it. TNT it off a building if you want to. I just know that if you'd been hounding me for this game for a year and I finally gave in and sold it to you, I know how I'd feel if I found out you sold it the next day. Again, not trying to be a dick, just trying to help you understand how the previous owner could be hurt by this.
Pricewise, I don't know where to put it. Cyclopes and Brenna's Quicksilver both sold for $5K. Not as rare, but certainly desirable games. This one? Who knows. Not many people have played it. I played it at Expo, but it was not set up properly and didn't play well. A 1 of 10 game and I walked away after one game. I think I would start at $5-6K and see what kind of interest you get. On ebay, the rarity alone would certainly get people to throw stupid money at it.
