I'm interested to see images of what you've got there , Bumbul25 .
There's not that much of a collector base for 'commemorative' silver ingots (except for a few famous/rare ones) ; the .999 (round , I think) one you mentioned is prob. worth it's weight .... the others , well .....
In my region of the country , most coin dealers will offer around $1-$2 less than 'spot' prices for silver ingots , esp. in small quanities .
An honest dealer will be happy to take a peek at your items , sans charge , esp. if you're putting them up for sale .... but if you're hesitant , they may wonder why .