It’s good you found someone you can trust. I have about 100 silver half dollars, 40 walking and 60 franklin I want to cash in for a good cause. Gonna take a lot of foot work.
Sell them on eBay. Seriously. About $140 a roll of 20. Minus 10% for eBay and 3% for Paypal.
Your coins are worth more then spot silver content. Obviously you are aware of the premium on silver Kennedy’s.
I bought a few gold coins on Ebay, but; I like deals on MS 60’s. I get very few MS quality at the pawn shop. I see mostly AU and lower. I doubt a pawn shop will pay the price you want, but; you may find serious buyers who frequent the shop. I run into diamond buyers, Rolex buyers, and; you name it. A number of gals buy their jewelry in pawn shops. It surprised me. The current drug crazy types keep these shops in new merchandise. Add the workers who steal while working in your house.