Best Buy via eBay offers the Lenovo Star Wars: Jedi Challenges AR Headset with Lightsaber Controller and Tracking Beacon for $49.99 with free shipping. That's tied with last month's mention as the best deal we've seen. (It's also the lowest price now by $22.) Use your iPhone or Android smartphone with this augmented reality headset to do lightsaber battles, holochess, or strategic combat.
You very likely are putting your laptop battery into an early grave.