On Cargurus.com, the vehicle with your parameters has examples with asking price from $28k - $38k, in a 200 mile radius of Raleigh, NC. Cargurus is a reasonable picture of market price. I recently bought a car that I found on Cargurus. No complaints, it's a good tool to shop with.
A 500 mile radius of Raleigh comes up with vehicles ranging from $23k to $45k.
A nationwide search comes up with $23k to $49k.
If you go down the Cargurus route, get your own CarFax report, inspect and test drive the car.
I researched CarGurus for a couple of months. It's a helpful tool for locating a Treg that meets your criteria. It also helps you get a sense of the year/mileage/price equation as it applies to the Touaregs. I never quite understood their rating system but, as you say, pricing varies greatly by region, and because of the unique nature of "Dieselgate", and the VW buyback, the depreciation formulas don't seem to apply to these cars the way you would think.
I think the sellers are using pent up demand to their advantage, Along with the flawed logic that somehow a "new 2016 Tdi" with very low mileage is indeed "new". When in fact those 2016s are heading into the 2019 model year. Don't forget that many, if not most of the quarantined Tregs have been parked out in the desert for the last couple of years. And not all of them have been refitted with new "perishables" i.e. tires, hoses, batteries, etc.
However, the "fixed" Tdis come with a GREAT! settlement warranty that should cover most of the emission issues. Oddly, drivability doesn't seen to be one of them.
The fact that there is no 2019 Treg available in the states, and no more Tdis at all, these are the last of their kind. Perhaps, this justifies the the current price structure. Hopefully the demand will continue to support the premium pricing going forward.
It's kinda sad that the Touaregs, new and old, didn't get the attention they deserved, until they were discontinued. I've owned 3 Tregs. And plan on keeping at least one in the garage for a long time to come.
