Most expensive Lego sets of the past 50 years04/01/2015April 1, 20151. Connection Kit 2013 ($754 USD) 2. Millennium Falcon 2007 ($499 USD) 3. Window Exploration Bag ($484 USD) 4. Death Star 2008 ($399 USD) 4. Super Star Destroyer 2001 ($399 USD) Source: Mashablehttps://p.dw.com/p/1F1W6Image: picture alliance/David EbenerAdvertisement