Why is it saying my variable is a nil value?

Here's the output:

11:46:20.944 - Workspace.Buttons.Basic Dropper - FREE.Head.Script:18: attempt to index local 'dropper' (a nil value) 11:46:20.945 - Stack Begin 11:46:20.946 - Script 'Workspace.Buttons.Basic Dropper - FREE.Head.Script', Line 18 11:46:20.947 - Stack End

Here's the script:

function touch(hit)
	Tycoon = script.Parent.Parent.Parent.ID.Value 
	game.Lighting.Purchases:FindFirstChild(Tycoon)
	local x = hit.Parent:FindFirstChild("Humanoid")
	local dropper = Tycoon.BasicDropper

	
	if x ~= nil then
		
	local c =	x.Parent.Name
	local plr = game.Players:FindFirstChild(c)
	if plr ~= nil then
		
		if plr.leaderstats.Money.Value >=00 then
			
			
			plr.leaderstats.Money.Value = plr.leaderstats.Money.Value - 0
			dropper:Clone().Parent = workspace
			script.Parent.Parent:remove()
			
		end
		
	end
	
		
	end
	
end
script.Parent.Touched:connect(touch)

In Lighting, there is a model called 'Purchases'. In Purchases, there is a model called 'one'. The ID value is 'one'. The 'BasicDropper' is where it should be, so what am I doing wrong?