There is a Terra Transponder TR250 for sale on E-Bay for $15.00 so far. Mine cost me about $1200-1500 new. Of course I don't know if the E-bay one works, and it doesn't come with a mounting tray or manuals.
If it is working it seems like a steal. -- Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
