The Ultimate Collector's Series, or UCS, is a LEGO subtheme of Star Wars introduced in 2000 and was meant to be more detailed and aimed at older builders. These Ultimate Collector's Series sets tend to be larger, and more expensive than typical sets.
2007 LEGO Sets
For collectors, 2007 proved to be an important milestone for with the release of the Modular Buildings theme which initially included Café Corner (10182-1) and Market Street (10190-1). Also, the Star Wars license with LucasFilms was originally planned to end that year, but is renewed. To celebrate Star Wars' 30th anniversary, LEGO released a free, 14-carat gold C-3PO minifigure. 2007 also saw the discontinuation of a number of themes including Aqua Raiders and Knights' Kingdom II but also so the introduction of the Thomas and Friends theme.