NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Frank Reed
Date: 2018 Jun 9, 11:01 -0700
Hello Richard Libby,
Do you have photos of your sextant? Without photos there's really no way to assess its value or quality. Add some photos in a reply to your first message if possible. Here's a link to your original message: http://fer3.com/arc/m2.aspx/C-Plath-Sextant-RichardLibby-jun-2018-g42202.
Truth is, the only measure of value in the world of old sextants is the price that it sells for. I have bought and sold quite a few sextants. Ebay is still the best place to sell a sextant, and they will normally sell there at the best price you're likely to get. List it at any low price, e.g. $20, or if you find that too scary, then $100. Bidders will push the price up very quickly. On the other hand, if you list it at the price you think it's "worth", you will probably get no bids (even if your estimate is reasonable). That's how auctions work. As long as there are enough bidders (and for sextants, there are), you do better starting low.
Frank Reed