The Token Shop is restocked manually. New items are announced with a news post, and then the item will RS 2-3 more times without one.

Yes, unfortunately...It did a potion restock last week? I think.

So then, if the entire shop is greyed out that means you can't purchase anything? Because I'm sure I have the right 'currency' for the shop.

yeah..when everything is greyed out, nothing is in stock. If you save your wizard tokens though ..then you'll have the right currency for it when it does restock c: