Silver szelag/solidus

Not my coin, but it is being offered for sale. This is from Livonia I think, but I am having trouble finding the exact type. Sorry about the blurry image on one side but there's nothing I can do as I don't have the coin myself. Anyone know what this coin is exactly and what it may be worth?

That is not from Livonia, but rather the Polish-Lithuanian Commonwealth. On the reverse, I can read "LIT", meaning it would be a piece minted at Vilnius; on the upside-down obverse, I can read "SIG", meaning it was made under the ruler Sigismund III Vasa.

The date is hard to read. Only the two last digits are shown, with the first being a 2 (or rather a Z), but the last... maybe it is a 0? I am not so sure.

Anyways, it should be this coin: https://en.numista.com/catalogue/pieces126670.html.

(And I am not sure what it would be worth.)

I'm almost sure it is: Kopicki 3457, year 1623 with short date Z-3.

For this type of coin no exist year Z-0 (1620)

Yes,this is the Lithuanian schilling 1623 with date Z3: https://www.fortresscatalogue.com/index2.php?cat=1623PL01200&page=Coin_Details But it's not so expensive in reality: https://archiwum.allegro.pl/oferta/55-szelag-lit-1623-zygmunt-iii-waza-rzadszy-typ-z3-i7288812148.html https://archiwum.allegro.pl/oferta/szelag-1623-wilno-data-z3-bardzo-rzadki-r5-i7228091086.html https://archiwum.allegro.pl/oferta/szelag-1623-wilno-data-z3-bardzo-rzadki-r5-i7207252760.html