Honestly that's what I'd pay. I'd use them.
Thing is...only advantage is at the pinch ...and thst would require modifying them and losing that collector value 'to an extent'.
I did state that a numbers guy would offer a 1000 or more for them. That's the truth, could be 2500. But as is, 800.00 is as much as I would gamble or would pay to have a head marginally better than a regular j head.
I'm not a purist collector, though I am into oddball vintage performance,factory or not.
I respect you might not agree with my view.
I didn't mean it as the end all.