WIW Big Block HP manifolds

$700 plus tax for a new set, maybe $500 for used isn’t out of the question? I wonder where the new ones are made?
Yours look nice and look like they would clean up very well. $500 might be on the high end, but a guy who wants the numbers on yours would jump on them for that.
I don't know where/who makes Tony's. You could call and ask. I talked to him once, he was nice enough.