In 2000, LEGO released 3 Castle Ninja sets, all of these sets have been retired. For that year, the total price of all retail sets cost $15, today those sets are valued around $1,090, a growth of 7183%.
Most valuable 2000 LEGO Castle Ninja set
3346 Three Minifig Pack Ninja #3 $636.67
3 sets

3344 One Minifig Pack Ninja #1

Theme / Subtheme Castle / Ninja
Year 2000
Pieces / Minifigs 9 / 1
Availability Retired
3344 LEGO Castle One Minifig Pack Ninja #1
Retail $4.99
Value $157.00
Growth  +3046.3%
Annual growth 8.5%

3345 Three Minifig Pack Ninja #2

Theme / Subtheme Castle / Ninja
Year 2000
Pieces / Minifigs 21 / 3
Availability Retired
3345 LEGO Castle Three Minifig Pack Ninja #2
Retail $4.99
Value $296.66
Growth  +5845.1%
Annual growth 11.2%

3346 Three Minifig Pack Ninja #3

Theme / Subtheme Castle / Ninja
Year 2000
Pieces / Minifigs 22 / 3
Availability Retired
3346 LEGO Castle Three Minifig Pack Ninja #3
Retail $4.99
Value $636.67
Growth  +12658.9%
Annual growth 15.3%