Harry Potter and the Philosopher's was the first LEGO theme based on Harry Potter and the first of the novels. The sets are based on the movie version rather than the book version. There were 15 set released in all 2001 to 2002
Philosopher's Stone was introduced in 2001 and currently consists of 26 sets. As of today,
4709 Hogwarts Castle is the most valuable Philosopher's Stone set with an estimated new/factory sealed value of $368.
Summary
Harry Potter Philosopher's Stone The Room of the Winged Keys set 4704 was released in October 2001, retailing for $20, but has since been retired. New, unopened The Room of the Winged Keys sets are valued at $100, while used sets can be found for $33 in good condition.
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