Maybe some sucker would bite on it for 500.00 or so and think that they were getting a deal... You can always go down on the price but you can't go up. It might be worth a shot, who knows what could happen.
For me the max I would go is $100.00 on any Zaxxon but it would half to be in really good shape. It's just not that great of a game. Plus there are way more other games I would rather have sitting in that space atm.