[Tom of VA]

About a month ago I was on a parts hunt and found a junk yard about an hour from me that still has old cars. He said he had 5 thunderbirds form 64 to 69 with FEs. I did't go further because I found what I was looking for elseware. I was wondering what these motors would be worth? He said they are complete in the cars and wanted 500 to 700 a piece for the motor. Anyone know what a FE core is worth? I might go out and take some pictures and collect some numbers.