Are there ever items there? What sort of coins do I need to shop there?

It restocks 1 item at a time randomly throughout the day. You have to be pretty lucky to catch something there, but usually people will try to check once or twice every hour. Eventually you'll probably see a few things at least.

You use Wizard Tokens to buy the items there. The prices can vary depending on the item.

Thank you . Do you have a recommendation of how many Wiz Tokens I should have on hand, just in case I see something there?

You don't really need to have any out in your inventory, it will just take them from your currency bank. I usually like to have at least a couple thousand in there for BHH or the Token Shop, it builds up quickly doing wizard quests every day.

Thank you for all your help with the questions I've been posting here the past few days, :)

Also if you go too often the Gatekeeper will tell you that you have been banned from there. It does not last long, at most an hour. Just means you can't check for items till it is over.

Thank you for more information