It is pretty rear but on ebay you can find a new v2 with gy401, s9650, hs65hb, and of course the speed controller and battery for $630. Now you can get the HDX for $200 (ebay reserve), GY401 $138, S9650 $65, HS 65HB x3 $75, Speed Controller (align 35a x) $55, Battery $60 (again align 2100 22c) = $593. Dont get me wrong the T-rex for this price is not common but here is the link:

http://cgi.ebay.com/ALIGN-T-REX-450S...QQcmdZViewItem

Remember the HDX come with motor only (so i believe)and the T-rex comes with spare blade, esc, motor and battery which is about say $120 excluding the Motor and including "wooden blades" (HDX comes with carbons also so unfair to price those).

However im still drawn to the HDX.