How do I find out value of a pair of bows

[Sahmto4]

Hi.  I’m trying to help my friend find the value of bows his parents owned.
Both are Wing Archery Company.  Gull model.  From 60s.  One is 64” and 30# the other is 64” and 40#.  They are both in what appears to be wonderful condition.
It’s been years since they have been used.  Stored inside the home.
How would we go about finding the value and if there is a market for these.

Thank you