If you don't feel to put it together by yourself, than let them build it. But if you do so, I would come for it by car or something, not sure about the transport via postal services.
Anyways I recommend to build it by yourself, it's **** of a fun and you get more familiar with it.
Roark posted a great video about it couple pages ago.
Not sure about english speaking people there - I can help tho.
Anyways they are prepairing shop in Pilsen, so you would have to order it from the stock anyways, so I belive it doesn't matter.
But if it helps, I bought it at Praha 4 - Háje