Help for valuation of the medieval Reval 1 Schilling - Johan III

I have a coin like this. Is in pretty good condition.
I want to sell it. Any idea about the valuation of this?
These are actual photos:

Any comments please send to kriim@hot.ee
wbr,
Enn

Nice coin!

When I read the title, my first thought was: not that much. However, you have a quite rare variety of the extremely common Johan III type. The one with an IR monogram is the common type; the one with an I monogram is not.

To compare prices on the coins from the medaeival Baltics, I find Haljak Auction is a good place to look. They specialize in these coins, and while they have many IR monogram types, after a quick search, I have only been able to find three I monogram types (well, three without the date--with the date is even rarer):

Sold for 75 euros: https://www.numisbids.com/n.php?p=lot&sid=2212&lot=215
Sold for 75 euros: https://www.numisbids.com/n.php?p=lot&sid=2767&lot=471
Sold for 100 euros: https://www.numisbids.com/n.php?p=lot&sid=2428&lot=354

That last one has a lot of lustre, unlike yours (not that I can see from those pictures, at least), but the first two look rather comparible. The estimated price on both was 40 euros, but obviously they sold for quite a bit more than that.