In 2004, LEGO released 2 Mindstorms 1 sets, all of these sets have been retired. For that year, the total price of all retail sets cost $37, today those sets are valued around $50, a growth of 36%.
Most valuable 2004 LEGO Mindstorms 1 set
9889 Temperature Sensor $29.35
Highest growth 2004 Mindstorms 1 set
9911 Touch Sensor and Leads +74.56%
Theme / Subtheme Mindstorms / 1
Year 2004
Pieces 1
Availability Retired
9889 LEGO Mindstorms Temperature Sensor
Retail $24.99
Value $29.35
Growth  +17.4%
Annual growth 3.2%
Theme / Subtheme Mindstorms / 1
Year 2004
Pieces 3
Availability Retired
9911 LEGO Mindstorms Touch Sensor and Leads
Retail $11.99
Value $20.93
Growth  +74.6%
Annual growth 3.0%