WELCOME TO THE FORUM. Appears not to many are sending out the WELCOME flags. Actually it all depends on what that person considers junk Silver. To them it may be just common dates in poor condition or dented, scratched, drilled holes, etc. If these are really garbage, then way to high of a price. However, you should look at the coins first. They may well be just worn but still in Fine or almost fine and common dates. You said sales person. Did you mean in a hobby store? Coin store? independant coin dealer? Flea market? Like I said so much depends on what that person's ideas are of JUNK.
At a flea market I go to there is a person that has numerous coins for sale. They are just dumped into large bins. Two bins for US and one for foreign. He considers them all JUNK coins. I've found a few
Mercury dimes in there that are in the HUNDREDS of dollar area for $1 each. One was a 42/41.
So again so much depends on who, what, where, etc. Get to know coins and who knows.