Here is the catalog value.
https://www.ngccoin.com/price-guide/world/austria-20-kreuzer-km-2141-1806-1814-cuid-63746-duid-177724
The real value is what someone wants to pay for it....
http://www.ma-shops.com/schimmer/item.php5?id=56215&lang=en
http://www.ma-shops.com/koci/item.php5?id=5781&lang=en
https://en.numista.com/catalogue/pieces18835.html
FRANSISCUS.I.D.G.AUST.IMPERATOR
Franz primus dei gratia Austria imperator
Franz the first, by gods grace, Austrian emperor
HUN.BOH.GAL.REX.A.A.D.LO.SAL.WIRC.date
Hungariae Bohemiae Galiciae rex, archidux Austriae dux Lodomariae Salisburgensis Wirceburgi
king of Hungary, Bohemia and Galicia, archduke of Austria, duke of Lodomeria, Salzburg and Wurzburg
nice quality