#4 Lego Star Wars

At 7541 pieces, it is the largest Star Wars Lego set ever released; and the largest set of any collection ever commercially released. The newest Ultimate Collector Series set is also the 75192 Millennium Falcon. On June 5, 2015 an unopened box of the older 2007 Millennium Falcon Lego set was auctioned at online auction house Catawiki for 5,000 euros (5556.5 USD at the time) making it the most expensive LEGO set ever.