What would this be worth?

[suicideneil]

Part it out ( to an extent ), you'll get a lot more money back that way. As an rtr, I rarely see maxxes of any condition/ upgrade level sell for more than about $300-400 at most.
Also, go onto egay and select 'completed items' or whatever it is to see auctions that have finished with the same description as yours, always a good way to get a rough idea of value.