My buy script isn't functioning fully, is there something wrong?

Here's my script. When the player Prestige, I also wanted to give them a certain amount of stat on Prestige (in leaderstats), but this don't seem to work, what am I doing wrong?

local items = script.Parent.Frame:GetChildren()
for i = 1, #items do
function buy()
local Cash = script.Parent.Parent.Parent.Parent.leaderstats:FindFirstChild(items[i].Currency.Value)
local Prestige = script.Parent.Parent.Parent.Parent.leaderstats:FindFirstChild(items[i].Prestige.Value)
if Cash.Value >= items[i].Cost.Value then
Cash.Value = Cash.Value - items[i].Cost.Value
Prestige.Value = Prestige.Value + items[i].Prestige.Value
local toolca = game.Lighting:FindFirstChild(items[i].ItemName.Value):Clone()
local toolcb = game.Lighting:FindFirstChild(items[i].ItemName.Value):Clone()
toolca.Parent = script.Parent.Parent.Parent.Parent.Backpack
toolcb.Parent = script.Parent.Parent.Parent.Parent.StarterGear
end
end
items[i].BuyButton.MouseButton1Click:connect(buy)

end

(In a LocalScript) I cleaned up the script, so yeah.

NOTE: This is not tested.

local items = script.Parent.Frame:GetChildren()
local plr = game.Players.LocalPlayers

while wait(0.01) do
	for i = 1, #items do
		items[i].BuyButton.MouseButton1Click:connect(function()
			local Cash = plr.leaderstats:FindFirstChild(items[i].Currency)
			local Prestige = plr.leaderstats:FindFirstChild(items[i].Prestige)
			if Cash.Value >= items[i].Cost.Value then
				Cash.Value = Cash.Value - items[i].Cost.Value
				Prestige.Value = Prestige.Value + 1 -- You might had've forgotten this
				local toolca = game.Lighting:FindFirstChild(items[i].ItemName.Value):Clone()
				local toolcb = game.Lighting:FindFirstChild(items[i].ItemName.Value):Clone()
				toolca.Parent = plr.Backpack
				toolcb.Parent = plr.Backpack
			end
		end)
	end
end

Hope this helped!