In 2003, LEGO released 3 Bionicle Accessories sets, all of these sets have been retired. For that year, the total price of all retail sets cost $6, today those sets are valued around $295, a growth of 4920%.
Most valuable 2003 LEGO Bionicle Accessories set
8599 Krana-Kal $170.32
Most owned 2003 Bionicle Accessories set
8580 Kraata
3 sets

8580 Kraata

Theme / Subtheme Bionicle / Accessories
Year 2003
Pieces 3
Availability Retired
8580 LEGO Bionicle Kraata
Retail $1.99
Value $41.50
Growth  +1985.4%
Annual growth 10.6%

8599 Krana-Kal

Theme / Subtheme Bionicle / Accessories
Year 2003
Pieces 5
Availability Retired
8599 LEGO Bionicle Krana-Kal
Retail $1.99
Value $170.32
Growth  +8458.8%
Annual growth 13.9%

8600 Krana-Kal

Theme / Subtheme Bionicle / Accessories
Year 2003
Pieces 5
Availability Retired
8600 LEGO Bionicle Krana-Kal
Retail $1.89
Value $82.87
Growth  +4284.7%
Annual growth 13.2%