In 2001, LEGO released 3 Technic Speed Slammers sets, all of these sets have been retired. For that year, the total price of all retail sets cost $44, today those sets are valued around $137, a growth of 312%.
Most valuable 2001 LEGO Technic Speed Slammers set
8242 Slammer Turbo $56.43
Highest growth 2001 Technic Speed Slammers set
8241 Battle Cars +491.99%
Theme / Subtheme Technic / Speed Slammers
Year 2001
Pieces 152
Availability Retired
8240 LEGO Technic Speed Slammers Slammer Stunt Bike
Retail $14.99
Value $27.50
Growth  83.5%
Annual growth 2.6%
Theme / Subtheme Technic / Speed Slammers
Year 2001
Pieces 115
Availability Retired
8241 LEGO Technic Speed Slammers Battle Cars
Retail $8.99
Value $53.22
Growth  492.0%
Annual growth 6.5%
Theme / Subtheme Technic / Speed Slammers
Year 2001
Pieces 253
Availability Retired
8242 LEGO Technic Speed Slammers Slammer Turbo
Retail $19.99
Value $56.43
Growth  182.3%
Annual growth 4.5%