https://www.apmex.com/
It’s only closed on weekends, IIRC.
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Not sure it is ever closed. My grandpa always gave me a “big nickel” (silver dollar) for my birthday.
I was recently checking out this site to order some for my grand kids and ordered some on a Sunday.
Ha, my grandpa gave me a silver dollar he found when he was a boy, and he was born in 1909. He didn’t have a lot of money, lived off the land, and didn’t really need a lot of money. :)