here is a little background:
That site appeared in the "scene" when the first PS3 widely usable exploit was "discovered". The original Teensy would work as a trigger for the exploit (as a diy re-programmable dongle, because teensy is a development platform)
Most people rushed to buy teensy boards and the original site got flooded by requests. There was a delay of months to get a board. then this site appeared selling cheap knock-offs of the board.
I would NEVER trust or buy anything from them. They literally stole a board design and started selling counterfeit parts without even warning the buyers it was a cheap knock off.
no, they can't. That only proves they have established a business and are operating, they already were doing that a few years ago when they stole the teensy and sold 1.0 chips in 2.0 boards. The boards were shipped, but they were cheating customers by selling counterfeit products.
It may not happen today, or even to you, but this guys will disappear one day, and take the money with the orders without any doubt, because they are that kind of people.
You can keep buying from them, and nothing may happen to you, but you are tempting luck. You have been warned about them. It's a good advice not to trust them, but do what you must, it's your choice. I hope you get your product soon.