I'd have to agree with Agro, since I have been watching Sandman sales the vast majority coming up for sale seem to be in either Victoria or NSW.

Vans as a whole be they Sandman's or not seem to be quite scarce compared to sedans, utes and even one tonners. A search on Ebay and car sales sites brings up very few panelvans for sale. It will be interesting to see where Sandman van prices go over the next few years.