I am having hell with these scripts! Can any give any advice with saving backpack items?

I have tried and tried this, I cannot for the life of me figure it out! I have a script set up so a player can buy items, then they are taken from the replicated storage as a clone, and into the players starter gear and backpack. Here is that script

script.Parent.MouseButton1Click:connect(function()
    local RS = game:GetService('ReplicatedStorage')
    local item = RS:WaitForChild('GrappleHook')
    local price = 0
    local player = game.Players.LocalPlayer
    local stats = player:WaitForChild('leaderstats')

    if stats.Cash.Value >= price then
        stats.Cash.Value = stats.Cash.Value - price
        local cloned = item:Clone()
        local cloned2 = item:Clone()
        cloned2.Parent = player.Backpack
        cloned.Parent = player.StarterGear
    end
end)

and that works just fine,, one time. i dont want the player to have to purchase a new one everytime they die, that would be frustrating to everyone. But my problem is that when players die the tool just disappears, they have to re purchase the item. Here is the script im using to try to save the tool. Do you see any problems that could be getting in the way, any pointers you could give me? here is the data store script

local RunService = game:GetService("RunService")
local ToolData = game:GetService("DataStoreService"):GetDataStore("ToolData")

local ToolLocation = game.ServerStorage.Tools -- The location where all your tools are saved

function GetToolByName(toolName)
    for _, tool in pairs(ToolLocation:GetChildren()) do
        if tool.Name == toolName then return tool end
    end
end

function IsRegisteredTool(tool)
    for _, playerTool in pairs(ToolLocation:GetChildren()) do
        if playerTool.Name == tool.Name then return true end
    end
end

game.Players.PlayerAdded:Connect(function(player)
    repeat wait() until player.Character
    local dataKey = "tool-data_"..player.UserId
    if ToolData:GetAsync(dataKey) then
        for i, toolName in pairs(ToolData:GetAsync(dataKey)) do
            local newStarterTool = GetToolByName(ToolData:GetAsync(dataKey)[i]):Clone()
            local newTempTool = GetToolByName(ToolData:GetAsync(dataKey)[i]):Clone()
            newStarterTool.Parent = player.StarterGear
            newTempTool.Parent = player.Backpack
        end
        ToolData:SetAsync(dataKey, {})
    end
end)

game.Players.PlayerRemoving:Connect(function(player)
    local dataKey = "tool-data_"..player.UserId
    local playerTools = {}
    for _, tool in pairs(player.StarterGear:GetChildren()) do
        if tool:IsA("Tool") and IsRegisteredTool(tool) then table.insert(playerTools, 1, tool.Name) end
    end
    if RunService:IsStudio() or #playerTools < 1 then return end
    ToolData:SetAsync(dataKey, playerTools)
end)

thanks everyone!!