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.
Ultimate Collector Series was introduced in 2000 and currently consists of 40 sets. As of today,
10018 Darth Maul is the most valuable Ultimate Collector Series set with an estimated new/factory sealed value of $3,520.
Summary
Star Wars Ultimate Collector Series Imperial AT-ST set 10174 was released on October 24, 2007, retailing for $80, it has since been retired. New, unopened sets are valued at $637, while used sets sell around $250.
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