In 2003, LEGO released 2 Harry Potter Chamber of Secrets sets, all of these sets have been retired. For that year, the total price of all retail sets cost $30, today those sets are valued around $245, a growth of 817%.
Most valuable 2003 LEGO Harry Potter Chamber of Secrets set
4720 Knockturn Alley $177.13
Most owned 2003 Harry Potter Chamber of Secrets set
4719 Quality Quidditch Supplies
Theme / Subtheme Harry Potter / Chamber of Secrets
Year 2003
Pieces / Minifigs 120 / 1
Availability Retired
4719 LEGO Harry Potter Chamber of Secrets Quality Quidditch Supplies
Retail $9.99
Value $67.73
Growth  578.0%
Annual growth 5.8%
Theme / Subtheme Harry Potter / Chamber of Secrets
Year 2003
Pieces / Minifigs 209 / 2
Availability Retired
4720 LEGO Harry Potter Chamber of Secrets Knockturn Alley
Retail $19.99
Value $177.13
Growth  786.1%
Annual growth 7.4%