The alcohol-fuelled (on one side at least) dispute over statistics is amusing, but irrelevant. What matters is whether one can see a need/justify the expense of a Thermomix.
A relative of mine is a Thermomix demonstrator (in Australia). It seems like a lot of hassle to organise the "parties" (a bit like Tupperware I think) and end up (according to her) selling one or two a quarter. They are priced at around $2000 here, and that, to me at least, is an incredibly high price point for what you get.