In 2005, LEGO released 6 Technic sets, all of these sets have been retired. For that year, the total price of all retail sets cost $326, today those sets are valued around $1,086, a growth of 233%.
Most valuable 2005 LEGO Technic set
8421 Mobile Crane $464.35
Highest growth 2005 Technic set
8420 Street Bike +481.04%
6 sets

8415 Dump Truck

Theme Technic
Year 2005
Pieces 284
Availability Retired
8415 LEGO Technic Dump Truck
Retail $29.99
Value $82.27
Growth  +174.3%
Annual growth 3.0%

8416 Fork-Lift

Theme Technic
Year 2005
Pieces 729
Availability Retired
8416 LEGO Technic Fork-Lift
Retail $69.99
Value $139.87
Growth  +99.8%
Annual growth 3.4%

8418 Mini Loader

Theme Technic
Year 2005
Pieces 66
Availability Retired
8418 LEGO Technic Mini Loader
Retail $5.99
Value $20.64
Growth  +244.6%
Annual growth 5.8%

8419 Excavator

Theme Technic
Year 2005
Pieces 286
Availability Retired
8419 LEGO Technic Excavator
Retail $19.99
Value $88.43
Growth  +342.4%
Annual growth 7.5%

8420 Street Bike

Theme Technic
Year 2005
Pieces 506
Availability Retired
8420 LEGO Technic Street Bike
Retail $49.99
Value $290.46
Growth  +481.0%
Annual growth 9.2%

8421 Mobile Crane

Theme Technic
Year 2005
Pieces 1,884
Availability Retired
8421 LEGO Technic Mobile Crane
Retail $149.99
Value $464.35
Growth  +209.6%
Annual growth 6.1%