Not got one, but know the VW market a bit, and they are rare as hens teeth.
If there are any used, they will likely be a reasonable price, as the 4wd set up need servicing, and people are wary of them, so they tend to be decent value. There are a few T4 syncro's out there too.
In the 2-3 weeks of ice/snow we get a year, they would be great, however, you lose out on fuel consumption the rest of the time, so I guess it depends on where you are in the country, as to if you can justify it.