You need to use at least the BF8 (or 23AE06) code to get the discounted price, though the other codes are available for larger orders.
Price conversion by Google, YMMV. As I understand it it is one of the best Hall Effect controllers out at the moment, though it can unfortunately have some QC issues.
Nice that you get the travel case included. The option without the case is currently out of stock.
Just to let people know there is a one piece special edition version which I bought. It just costs closer to $100