So, just transfer
half a million dollars to the Ukraine, >>>
via Paypal, Mastercard or Visa <<< and they'll send you a CD.
Maybe there's a typo or they made an error in the exchange rate.
Best case, you get plans for a machine that you can't sell without licenses for Segway IP. On the other hand, you do get "assemblages of all mechanical knots", so maybe that's worth half a mil in itself.