Value of Milligan flute from 1770s--1820s

I have a Milligan flute made in London between the 1770s and 1820s. It’s boxwood, probably in Eb.

It’s similar to the one pictured in this list – http://www.music-treasures.com/antflupi.htm

Any idea how I can place a value on it or get a price for it?

Thank you.

Hi Bobbie
You may get a better response if you post an actual photo of your flute, the list you link to isn’t of your flute but about 100 flutes, I find people engage more when they don’t have to search through hundreds of images to find one that looks a bit like yours.