Hancock and Moore Leather Desk Chair Value

[Jeremy]

I have a H&M leather desk chair that I bought new in the mid '80's that I'm interested in selling, but have no idea what it's worth. I've attached a couple of pictures. A few blemishes in the leather, a repaired cracked wooden cover of a caster arm, and recently the cushion and seat were re-stuffed. Any suggestions on a purchase price?
Thanks.