I bought mine a number of years ago for $20. It was not factory sealed, but it had never been used and it came fresh in the box. $50 for a new/sealed one seems about right, maybe slightly high, but there's no reason you shoudn't be able to find a used one cheap.
That aside, the reason I mentioned one of these is because the button/stick layout is identical to the US TurboStick not to mention they are electrically identical inside as well. They are also the roughly the same dimensions.