How do I save guis with DataStore?

I'm making a simulator that has a shop gui. I can save the leaderboard and the backpack but not the guis. For example, if the player buys an item the buy button would be destroyed. But when the player rejoins, the buy button would still there. Which means that you can buy the item twice. Sorry if you don't understand.

-- the script that is going to fire the remote

tool = game.Lighting.Tools.Dominus1
player = game.Players.LocalPlayer
money = player.leaderstats.Clicks
price = script.Parent.Cost.Value
buybutton = game.StarterGui.ShopGui.ShopFrame.Item1



function buy()
     if money.Value >= price then
        money.Value = money.Value - price
        workspace.EventsScript.BuyItem1:FireServer()
        wait()
        buybutton.Visible = false
    end
end

script.Parent.MouseButton1Down:Connect(buy)

-- the script that is going to be the event (the script in workspace)

script.BuyItem1.OnServerEvent:Connect(function(plr)
    wait()
    local a = tool:clone()
        a.Parent = plr.Backpack
        local b = tool:clone()
        b.Parent = plr.StarterGear
end)