Hot Rods Need help determining a M/T part value

I need some ***istance from you people much more in the know than I. I come to the deep well of knowledge.

I have a M/T magnesium idler and adjuster plate along with a magnesium blower pulley and magnesium blower drive snout. All good condition vintage stuff.

I have realized that I will never use it and offered the complete set up to someone looking for magnesium blower parts for a vintage Hemi build.

Being that I have no idea of a value, I left it to him to make an offer. Which I dislike doing.

My question is, what is a good fair price for the set? I don’t want to overcharge but I don’t want to short change myself.

Please, if you wouldn’t mind, give me some insight.

As always, much gra***ude.

 

Maybe post it here too, I only found a single pulley on ebay for $250

https://www.jalopyjournal.com/forum/threads/vintage-mickey-thompson-speed-parts.317915/page-5

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Thank you. I just posted a reply in that thread.