Looking at $6K if you own the game and about $4.5-$5K if you don't own the game and want one. I've seen a couple sell recently between $5 and $5.5K. I don't recall any of them not having some mods though.
My thought would be that if you put up IM plus $500 for AC/DC you would probally be able to do it after waiting patently for the right person to come along. If you put up IM plus $1K you'd probally get a trade in a week or 2.