1000s of dollars. Not joking. Other than scarcity, not sure what the appeal was for these.
There is ONE of these AEV front bumper in person that made me go "wow", but the reason for that was because it had been very carefully modified to accommodate a tunable sway bar in front, without any loss in strength and modified in such a way that you cannot tell it did not come made that way unless it was told to you. There is only one of these modified ones in the wild and the only one that I find pretty awesome.