TOKYO -- Sony's just-released PlayStation VR headset kit is so popular in Japan that used models are selling for nearly the same price as new ones. Sometimes, they are even more expensive.

Second-hand kits, which include a special camera to support virtual-reality functionality, are going for about 50,000 yen ($460), just 3,000 yen to 4,000 yen less than a new product. Second-hand stores are buying them for about 40,000 yen.

Released by Sony Interactive Entertainment in October, the PSVR flew off shelves so fast that electronics stores have already run out of stock. It is not yet known when the next shipments will arrive.

In Tokyo's Akihabara district, some stores are selling used models for more than twice the price of the original. Some shops are even taking to Twitter to let people know when they get their hands on a PSVR.

A similar phenomenon is happening with the latest PlayStation 4 console that gamers use with the headset. The price tag for a used 500-gigabyte model is about 30,000 yen, while a second-hand 1-terabyte model goes for around 35,000 yen, only about 2,000 yen to 3,000 yen less than new models.