ItemButton w/ IDSystem

--will show how to save in the subseries
local repStorage = game:GetService("ReplicatedStorage")
local remote = repStorage:FindFirstChild("BuyItem")

local button = script.Parent

local debounce = false

button.MouseButton1Click:Connect(function()
    if not debounce then
        debounce = true
        local Id = 0
        remote:FireServer(Id)
        wait(0.01)
        debounce = false
    end
end)