Walmart offers the Star Wars A New Hope Darth Vader Electronic Lightsaber, model no. B2922, for $13.59. Choose in-store pickup to dodge the $5.97 shipping fee. That's the lowest price we could find by $2. It's customizable with other BladeBuilders, which are sold separately. Batteries are required, but the type and quantity are unclear.
What's the most maddening fee you pay? To check your luggage? Bounce a check? Use an ATM? Not even close.