I think it's a combination of small supply, and than high demand caused by over excitable pipe smokers. It is good tobacco though, so the demand is not completley unjustified. It's a bit like the Sam Gawith stuff (from the US point of view) - it's really good tobacco, in short supply in a world with the internet to create 'buzz', driving up demand a lot more than would have been the case in the days when the only stuff you could get was what ever the local store had in stock and you just didn't know about these 'exotic' alternatives unless you happened to be in the business or something.