After one year of gathering pieces and building, Tobias and me finished today the Millennium Falcon Ultimate Collector’s Edition (LEGO set 10179, http://brickset.com/sets/10179-1/Ultimate-Collector-s-Millennium-Falcon). This version of the Millennium Falcon is not sold anymore and used sets sell for insane prices on Ebay.
We took the necessary bricks from two other Star Wars models: the Death Star (LEGO set 10188, http://brickset.com/sets/10188-1/Death-Star) and the Super Star Destroyer (LEGO set 10221-1, http://brickset.com/sets/10221-1/Super-Star-Destroyer).
However, we had to gather a substantial amount of missing parts, many of which we bought 2nd hand via the local Finnish online action site http://huuto.net or via BrickLink (http://www.bricklink.com), a sort of “specialised EBay” for LEGO pieces. The most difficult to find pieces were the two Light Bluish Gray Boat Mast Rigging Long 28 x 4 (http://www.bricklink.com/search.asp?itemID=56261&colorID=86), which sell at the moment for not less than 100€ per piece on BrickLink. We obviously did not get these pieces. However, LEGO still sells the black version of this piece as a spare part and Tobias’ mentor took the trouble to get these and paint them grey; thank you Clemens!