They claim that they went to China and bought these from the markets. If that's supposed to inspire confidence, sorry, but it doesn't. I can 100% guarantee you that coins bought under such circumstances will all be fake, because the probability of a casual tourist finding someone who is actually selling genuine silver dollar coins in the markets is zero.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis