After you buy the units you need to have them calibrated by a Bioness rep to make them work right plus you need to be able to buy spare parts. Unless you officially buy them from Bioness they won't help you. The Bioness crooks will even charge you $3400 to 'recertify' them for you if you buy used ones.
Cheaper for you to fly to US, get a doctors script for them and buy them officially.
Sorry, it does suck!