I would take no less than $1000 for the steel front bumper ,$800 each for the fenders,
$750 for the rear bumper, $400 for the deck lid, and $600 for the front hood.
I actually think the whole package is worth $5k. Hell when you have something like this
http://forums.pelicanparts.com/porsche-cars-sale/791793-1968-911-s-sunroof-coupe.html you would pay to the moon for your parts.