I paid $350 for a 95k mi great running PI engine with all of its accessories. Just keep an eye out you will find a good deal sooner or later.
What's kind of funny is there's a guy local to me that demos cars so he had like a ton of crown vics and Lincoln town cars sitting out in a field. He had been junking all the 4.6 he pulled out of them!!!!! I told him anytime another panther platform rolls through I got dibs on the engines!!