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 $981, a growth of 201%.
Most valuable 2005 LEGO Technic set
8421 Mobile Crane $494.67
Highest growth 2005 Technic set
8419 Excavator +431.27%
6 sets

8415 Dump Truck

Theme Technic
Year 2005
Pieces 284
Availability Retired
8415 LEGO Technic Dump Truck
Retail $29.99
Value $73.68
Growth  +145.7%
Annual growth 2.9%

8416 Fork-Lift

Theme Technic
Year 2005
Pieces 729
Availability Retired
8416 LEGO Technic Fork-Lift
Retail $69.99
Value $123.63
Growth  +76.6%
Annual growth 3.6%

8418 Mini Loader

Theme Technic
Year 2005
Pieces 66
Availability Retired
8418 LEGO Technic Mini Loader
Retail $5.99
Value $22.59
Growth  +277.1%
Annual growth 4.0%

8419 Excavator

Theme Technic
Year 2005
Pieces 286
Availability Retired
8419 LEGO Technic Excavator
Retail $19.99
Value $106.20
Growth  +431.3%
Annual growth 8.6%

8420 Street Bike

Theme Technic
Year 2005
Pieces 506
Availability Retired
8420 LEGO Technic Street Bike
Retail $49.99
Value $160.00
Growth  +220.1%
Annual growth 5.7%

8421 Mobile Crane

Theme Technic
Year 2005
Pieces 1,884
Availability Retired
8421 LEGO Technic Mobile Crane
Retail $149.99
Value $494.67
Growth  +229.8%
Annual growth 6.7%