A little update to my fellow collectors:
9 of the 270 parts are not availble trought lego, the rest is there.
261 parts * there quanty = 290,00 euro's
The fellow 9 parts are around 50,00 on BL, thats including a 10,00 Euro Blue Arch.
Im now researching normal parts on BL to Lego and it seems that BL is ALWAYS cheaper, up to 50% !