Stop in for a cup of coffee

Can be you kind of have to know values. They are always above bullion price. Thats what I got them for when the world goes to crap. I have found them all over the place. Gun shows, swap meets, Auction etc. Always think of them as the bullion price and no more than 30% above that. Definitely two different values coin vs Bullion.
And where do you find bullion price. And then there are different graded coins or do you just buy for the silver content??