| Already contacted New Era and the DD management about this...
New Era say they have ran out of transponders so will be getting a full stock to start the season so there will be no problems with availability at the meets. They also confirmed the prices Skids mentioned above.
I've tracked down a company flogging the fixed units (i.e. permanantly wire to the bike) for £175, and it's not hard to sell them on for £150 when you're done. One went on ebay recently for £163!!!
If you're planning on buying one then it's the TranX260 you'll be needing.
I'm going to be renting one because I can't be shedding that much money from my budget, even tho I'd get most of it back when the dust settles. | 
Hybrid Mode
