Where can I buy a diagnostic tool for BMW?

My cousin has a shop and he wanted to know where he can purchase an authentic diagnostic tool like the ones the BMW dealership mechanics use.|||You can get the european program on the Snap On Solus, Modis, or Solus Pro. The Solus Pro is like $3800 and the european add on is $1000. It comes with BMW 95 to current and all the adapters.|||Try ebay motors GOOD LUCK|||they might use a Snap On one which cost 1000's of dollars