Data store modifications not working?

I am trying to modify an invisible leaderstats with a local script and it works, but it doesn't. When I leave and join the game my money is the same and I do not have the thing I have purchased.

Local script (shop item)

        local item = script.Parent
        local rs = game.ReplicatedStorage
        local Noob = script.Parent.Parent.Parent.Frame3.Equip.Noob

        local value = 10 -- Change this to the price of your item


        item.MouseButton1Click:connect(function()
            if game.Players.LocalPlayer.leaderstats.Money.Value >= value then
                game.Players.LocalPlayer.leaderstats.Money.Value = game.Players.LocalPlayer.leaderstats.Money.Value - value
                item.Text = "Purchased"
                Noob.Visible = true
                value = 0
                game.Players.LocalPlayer.leaderstats1.Purchases3.Value = 4
                script.Parent.Parent.Parent.Frame3.Locked.Noob1.Visible = false
                script.Parent.Parent.Parent.Available.Visible = true  
                wait(2)
                script.Parent.Parent.Parent.Available.Visible = false




          else
            item.Text = "Purchase Failed"
            wait(1)
            item.Text = "Noob $10"

            if game.Players.LocalPlayer.leaderstats1.Purchases3.Value == 4 then
                value = 0
                Noob.Visible = true
            end
        end
        end)

Local script (get value (inventory))

local purchases = game.Players.LocalPlayer.leaderstats1.Purchases3



purchases.Changed:Connect(function()

    if purchases.Value == 4 then

        print("NoobT")

        script.Parent.Visible = true
        script.Parent.Parent.Parent.Locked.Noob1.Visible = false

    else

        print("Bye")

        script.Parent.Visible = false

    end

end)

Data Store (Invisble Leaderstats)

local datastore = game:GetService("DataStoreService")
local ds1 = datastore:GetDataStore("Purchases1SaveSystem")
local ds2 = datastore:GetDataStore("Purchases2SaveSystem")
local ds3 = datastore:GetDataStore("PurchasesSaveSystem")
local ds4 = datastore:GetDataStore("Purchases3SaveSystem")

game.Players.PlayerAdded:connect(function(plr)
 local folder = Instance.new("Folder", plr)
 folder.Name = "leaderstats1"
 local purchases1 = Instance.new("IntValue", folder)
 purchases1.Name = "Purchases1"
 local purchases2 = Instance.new("IntValue", folder)
 purchases2.Name = "Purchases2"
 local purchases = Instance.new("IntValue", folder)
 purchases.Name = "Purchases"
 local purchases3 = Instance.new("IntValue", folder)
 purchases3.Name = "Purchases3"

 purchases1.Value = ds1:GetAsync(plr.UserId) or 0
 ds1:SetAsync(plr.UserId, purchases1.Value)

 purchases2.Value = ds2:GetAsync(plr.UserId) or 0
 ds2:SetAsync(plr.UserId, purchases2.Value)

 purchases3.Value = ds4:GetAsync(plr.UserId) or 0
 ds4:SetAsync(plr.UserId, purchases3.Value)

 purchases.Value = ds3:GetAsync(plr.UserId) or 0
 ds3:SetAsync(plr.UserId, purchases.Value)

 purchases1.Changed:connect(function()
  ds1:SetAsync(plr.UserId, purchases1.Value)
 end)

 purchases3.Changed:connect(function()
  ds4:SetAsync(plr.UserId, purchases3.Value)
 end)

 purchases2.Changed:connect(function()
  ds2:SetAsync(plr.UserId, purchases2.Value)
end)

purchases.Changed:connect(function()
  ds3:SetAsync(plr.UserId, purchases.Value)
 end)

end)

Thanks!