Owned this for many many years NOS Progressive tri power linkage , what is it worth ?

did you look in ads here, or sites like eBay Motors?

 

@anthony myrick had one similar. Maybe he has an idea.

 

I’ve paid $20 to $100 for the NOS setups I’ve bought
It’s gotta at least be worth what a new setup is now. Plus a little extra for the cool sticker.

the $20 set up was an open box item missing a couple pieces.

the $100 was new in the box with cool instructions

 

Check what Chuck Price gets for his at Vintage Speed and add a few bucks for it being Eelco!

 

There's a forum for asking what's it worth. Look around the HAMB, ebay ettc

https://www.jalopyjournal.com/forum/forums/whats-it-worth.95/