Did LEGO recently change Millennium Falcon with a smaller kit? I have been interested in a Millennium Falcon kit but was holding back because of the price.(It was about €500) This was about two years ago.

Recently I saw another, cheaper Falcon for about €150, but I think this is a different, smaller kit, and unfortunately the only available Falcon.

Did LEGO really swap the Falcon kit for a smaller, cheaper version?
The Millennium Falcon has been so popular there appears there are six known sets, and seven versions. Four of which share the exact same product name.
Millennium Falcon, 2000 (7190) 600+ pieces
Millennium Falcon, 2003 (4488) Microscale version with only 87 pieces.
Millennium Falcon, 2004 (4504) 900+ pieces (New minifigures with the flesh skin colour).
Ultimate Collector's Millennium Falcon, 2007 (10179) 5000+ pieces
Midi-scale Millennium Falcon, 2009 (7778) 2nd microscale MF with 4x more parts then the 2003 model.
Millennium Falcon, 2011 (7965) 1200+ pieces
Millennium Falcon, Advent Calendar Day 21, 2011 (7958) 13 pieces
There also appears to be some Minifig variation, R2D2 and Darth Vader only appear once on the 2000 and 2011 sets respectively.