so you want the benefits of membership without actually joining...
the "this sort of chat" is chat relating to prices willing to be paid or that were paid"  amongst other things
not really something you want commercial sellers who you know are watching to know i would have thought.
anything technical etc etc etc is freely available to all at 
The Registry of Ex Military Land Rovers. Australia, New Zealand and elsewhere. and in the open areas of the remlr forum..
hardly cloak and dagger stuff ole mate....
otherwise get a ex mil vehicle and join, costs nothing :p