Id be checking the prices on 240-110 stepdown transformers for a start, otherwise its liable to be false economy.
The Mazzer Mini sucks down 250W by the mazzer website, so youll want *at least* a 300VA stepdown (best to have it a overrated, itll last longer that way, and the characteristic of these motors is that there is a surge at startup) considering that a quick search of a reputable supplier over here reveals their most suitable unit @ 500VA is $229.00 (they have a 250VA for $129 but like I say, I wouldnt be running it at full capacity, wont last, certainly not as long as the Mazzer...) I doubt very much the deal is *that* good. Particularly given that theres a decent size used market for Mazzers and the things are pretty much bulletproof. Also you basically lose the benefits of buying new (Warranty, etc.) by buying it over there anyway.