Hey zullar, Welcome to the forum!
The topic would have better response if it is moved to Goods > Collectibles subforum. You can use the bottom left "move topic" button to move this to the Collectibles subforum.
It's been a little longer time since I have seen a Kialara Silver coming up for sale/auction. The last auction (AFAIK) dates back to November 2019 where it was sold for 0.075
BTC at the price of $9200/
BTC But remember it was a lower number #57 and here you can find the auction details :
[AUCTION] Kialara Silver 1 BTC Bar #57 and Kialara Labyrinth #648 Hence you should assume that your bar might be fetching the price tag somewhere between $600-$800...
I would also like to here expert opinions on this who sold a Silver bar few months back!