I'm curious as to where you found some being sold. I keep an eye on the market and haven't seen any original ones. The Shuriken USB is not being produced anymore.
As Vega said, the original site (usbgecko.com) is long gone. They went for around $50 back then. The Shuriken USB went for around €24 in total (including shipping). So it was cheaper, but you needed to buy the cable separately. Since the seller stopped producing them, people will probably be willing to spend more on one.
For the most part, just use common sense when buying. I doubt people would be trying to scam using these things, but you never know. The main place to look would be on eBay, but you could google around and find some forums where people would be selling their old ones. I would only use PayPal when buying.
As Vega said, the original site (usbgecko.com) is long gone. They went for around $50 back then. The Shuriken USB went for around €24 in total (including shipping). So it was cheaper, but you needed to buy the cable separately. Since the seller stopped producing them, people will probably be willing to spend more on one.
For the most part, just use common sense when buying. I doubt people would be trying to scam using these things, but you never know. The main place to look would be on eBay, but you could google around and find some forums where people would be selling their old ones. I would only use PayPal when buying.