Well....
I put together a spreadsheet comparing the Station wagon ($85,500)with the Trial Master $96,495...
There's a couple of interesting comparisons: The difflock plus BFG KO2s called the "Rough Pack" is $2,875 , or $3,650 separately.
Difflocks by themselves are $2,790 if you want to stay with the Ineos/Bridgestone offering.
I priced up the Wagon with just those extras which I figure would be my view of "fit for purpose" 

 viz:  the Rough Pack, side runners (arthritic hip!) , roof cross bars, reflective privacy glass,Spare wheel storage box, a half height cargo barrier, tow pack, the high load electric panel, the Thatchem Class1 alarm system and carpeted floor. This came to a tad shy of $96K which then escalated to $112.5K with on-costs (excluding 'dealer fee') but incl Gst/LCT/Rego, Qld Stamp duty and RACQ comprehensive insurance (estimate). 
I've been assured from a couple of reliable sources that my current Dec 2019 Hyundai Santa Fe diesel which has 4 1/2 yrs factory warranty to run and less than 20K Km on the clock would bring close to new car price for a private sale such is the madness of the market at the moment... will wait and see.
I have written to Ineos customer service asking about the 1 7/8" towball ...Aust market is 50mm; whether power mirrors (unheated)  are standard. Also, whether there is a standard alarm/immobiliser and the Thatchem is an upgrade. I get the feeling that there will be a more detailed spec sheet released well before 18May (I sincerely hope there is!) which is the cutoff for early hand raisers for build slot deposit.
I took a quick look at "East Coast Commercial" website  for a "Ronny Dahl basic Troopy" There was one 2022 with approx 2,500km  at $109K while the rest of them between 4-6 yrs old with well over 130k km were asking $90K +!!  That scratched the Troopy itch!
 
Very grateful for all the other comments from varying perspectives on this topic... thank you
cheers
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