Am I Being Unreasonable? Original Owner Wants Car Back

H22A4 said
It’s your car so you can set the price you’re willing to let it go for. Sometimes sentimental value helps increase the price to a »I don’t want to sell it price » and that’s ok since it’s your car!

Help educate me through; what is market price of a ’71 340 Demon (tribute)? What is the price of a ‘71 340 Demon (tribute) with sweat equity and sentimental value?
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That's the tough part, it's either $5k for a rusted roller or $30k+ for built tributes from what I've seen, not much in between. Built H code cars $45k+ & #s H codes North of $60k. I've been searching for a long time & may have overpaid a little for what I got in hindsight but happy I have one.