A dealer will try to get them from you cheap, so they can make the real gravy when they sell them again. You are better off doing some research on the web first. Knowledge is power. By the way, the communist chinese have a rampent US Morgan silver dollar faking industry going at like 1000 miles per hour. Pretty good fakes that can fool alot of people, even halfway knowledgeable coin collectors. Beware, its scary out there!
To tell if they are fake, use a magnet on them. If the magnet sticks, their fake...Have son’s that have been collectors since their teens...depends on spot what they are worth just for the silver content...