Exolidus
Hello!
Values are based on evaluations by Numista users and sales realized on Internet platforms.
Soo…. you can check Ebay or something like this.
Or wait until sales at auctions.
+1
Good answer!
All catalogues give a very simple ballpark figure. They're based on algorithms & projections & these estimates become even more inaccurate, the lower the grade. These more unlikely figures (estimates) aren't very helpful (since demand drops off like a stone for most circulated notes).
I might take the a grade up from the common variety & use that as an estimate but the series should be tough. If I thought the note was F-VF (or 3 Euro) I may estimate it to be at the VF-XF price point (for the common variety) or 4 Euro. But you need the right buyer (who cares about varieties). The world banknote market probably won't care about a T series.
The 1961 100 Korun from Czechoslovakia just isn't that tough (Numista Rarity index 13) so that clouds things further (less collectors interested). The formula I used works better on tougher, higher denominations & series. Best bet is to see what it gets at auction.