Im trying to make a door you can buy but it is a 1 time purchase and when i walk up to the door to buy it it keeps draining my cash and is not 1 time or unlocked for the rest of the game my current script

local required_points = 0
 
local db = true
script.Parent.Touched:Connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") then
		local player = game.Players:GetPlayerFromCharacter(hit.Parent)
		if player.leaderstats.Cash.Value >= required_points then
			player.leaderstats.Cash.Value = player.leaderstats.Cash.Value - required_points
			if db then
						db = false
						script.Parent.Transparency = 1
						script.Parent.CanCollide = false
						wait(1)
						script.Parent.Transparency = .75
						script.Parent.CanCollide = true
						db = true
					end
				else
					player.Character.Humanoid.Health = 0
				end
			end
		end)
Anonymous