Ahhhh, I love it when people get taken and then attempt to recoup their losses by trying to get their money back out if the next guy.
Pass on them, hit up http://www.car-part.com and find your own set, delivered to your door for about 1/3 of what this clown is asking. Even if you paid for a new valve job, springs and seals you'll still likely not have much more than about half his asking sunk into the heads and intake.
We don't get anything delivered to our door here in Hawaii without a HUGE shipping cost! I bet shipping on a pair of heads is at least $250 or more. I will look around for you. I have an explorer lower, but might end up using it. If I find something I will give you a shout.
Chris