In 1999, LEGO released 33 Technic sets across 2 subthemes, all of these sets have been retired. Subthemes for that year included Competition and Slizer. For that year, the total price of all retail sets cost $556, today those sets are valued around $2,520, a growth of 353%.
Most valuable 1999 LEGO Technic set
8448 Super Street Sensation $621.26
Highest growth 1999 Technic set
1268 Bike Blaster +1094.97%
33 sets

1061 Single Disc Pack

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 1
Availability Retired
1061 LEGO Technic Slizer Single Disc Pack
promotional
Value $96.32
Annual growth 13.9%

1257 Tricycle

Theme Technic
Year 1999
Pieces 24
Availability Retired
1257 LEGO Technic Tricycle
promotional
Value $12.54
Annual growth 5.6%

1258 Buggy

Theme Technic
Year 1999
Pieces 29
Availability Retired
1258 LEGO Technic Buggy
promotional
Value $11.56
Annual growth 4.5%

1259 Motorbike

Theme Technic
Year 1999
Pieces 28
Availability Retired
1259 LEGO Technic Motorbike
promotional
Value $12.01
Annual growth 4.8%

1260 Car

Theme Technic
Year 1999
Pieces 26
Availability Retired
1260 LEGO Technic Car
promotional
Value $18.83
Annual growth 3.1%

1268 Bike Blaster

Theme Technic
Year 1999
Pieces 28
Availability Retired
1268 LEGO Technic Bike Blaster
Retail $1.99
Value $23.78
Growth  +1095.0%
Annual growth 6.4%

3000 Tribuggy

Theme Technic
Year 1999
Pieces 24
Availability Retired
3000 LEGO Technic Tribuggy
promotional
Value $49.95
Annual growth 4.7%

3001 Propeller Buggy

Theme Technic
Year 1999
Pieces 29
Availability Retired
3001 LEGO Technic Propeller Buggy
promotional
Value $45.27
Annual growth 7.4%

3003 Bike

Theme Technic
Year 1999
Pieces 28
Availability Retired
3003 LEGO Technic Bike
promotional
Value $75.33
Annual growth 9.3%

3005 Piston Car

Theme Technic
Year 1999
Pieces 26
Availability Retired
3005 LEGO Technic Piston Car
promotional
Value $37.87
Annual growth 9.2%

8246 Hydro Racer

Theme Technic
Year 1999
Pieces 46
Availability Retired
8246 LEGO Technic Hydro Racer
Retail $3.99
Value $12.34
Growth  +209.3%
Annual growth 5.1%

8247 Road Rebel

Theme Technic
Year 1999
Pieces 44
Availability Retired
8247 LEGO Technic Road Rebel
Retail $5.99
Value $14.27
Growth  +138.2%
Annual growth 2.6%

8251 Sonic Cycle

Theme Technic
Year 1999
Pieces 89
Availability Retired
8251 LEGO Technic Sonic Cycle
Retail $7.99
Value $20.00
Growth  +150.3%
Annual growth 2.8%

8252 Beach Buster

Theme Technic
Year 1999
Pieces / Figures 183 / 1
Availability Retired
8252 LEGO Technic Beach Buster
Retail $19.99
Value $40.00
Growth  +100.1%
Annual growth 3.6%

8253 Fire Helicopter

Theme Technic
Year 1999
Pieces / Figures 210 / 1
Availability Retired
8253 LEGO Technic Fire Helicopter
Retail $16.50
Value $58.35
Growth  +253.6%
Annual growth 4.8%

8255 Rescue Bike

Theme Technic
Year 1999
Pieces / Figures 202 / 2
Availability Retired
8255 LEGO Technic Rescue Bike
Retail $14.99
Value $86.96
Growth  +480.1%
Annual growth 5.6%

8268 Scorpion Attack

Theme / Subtheme Technic / Competition
Year 1999
Pieces / Figures 85 / 1
Availability Retired
8268 LEGO Technic Scorpion Attack
Retail $14.99
Value $54.49
Growth  +263.5%
Annual growth 4.8%

8269 Cyber Stinger

Theme / Subtheme Technic / Competition
Year 1999
Pieces / Figures 345 / 1
Availability Retired
8269 LEGO Technic Cyber Stinger
Retail $39.99
Value $66.27
Growth  +65.7%
Annual growth 2.5%

8444 Air Enforcer

Theme Technic
Year 1999
Pieces 309
Availability Retired
8444 LEGO Technic Air Enforcer
Retail $29.99
Value $95.74
Growth  +219.2%
Annual growth 4.4%

8445 Indy Storm

Theme Technic
Year 1999
Pieces 446
Availability Retired
8445 LEGO Technic Indy Storm
Retail $39.99
Value $168.26
Growth  +320.8%
Annual growth 3.6%

8446 Crane Truck

Theme Technic
Year 1999
Pieces 582
Availability Retired
8446 LEGO Technic Crane Truck
Retail $59.99
Value $220.78
Growth  +268.0%
Annual growth 3.6%

8448 Super Street Sensation

Theme Technic
Year 1999
Pieces 1,437
Availability Retired
8448 LEGO Technic Super Street Sensation
Retail $129.99
Value $621.26
Growth  +377.9%
Annual growth 6.0%

8450 The Mission

Theme / Subtheme Technic / Competition
Year 1999
Pieces 643
Availability Retired
8450 LEGO Technic The Mission
Retail $99.99
Value $149.73
Growth  +49.7%
Annual growth 1.5%

8500 Torch

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 33
Availability Retired
8500 LEGO Technic Slizer Torch
Retail $5.99
Value $57.30
Growth  +856.6%
Annual growth 6.7%

8501 Ski

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 34
Availability Retired
8501 LEGO Technic Slizer Ski
Retail $5.99
Value $44.15
Growth  +637.1%
Annual growth 4.2%

8502 Turbo

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 45
Availability Retired
8502 LEGO Technic Slizer Turbo
Retail $5.99
Value $27.78
Growth  +363.8%
Annual growth 5.8%

8503 Scuba

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 39
Availability Retired
8503 LEGO Technic Slizer Scuba
Retail $5.99
Value $36.28
Growth  +505.7%
Annual growth 5.5%

8504 Jet

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 44
Availability Retired
8504 LEGO Technic Slizer Jet
Retail $5.99
Value $46.62
Growth  +678.3%
Annual growth 4.2%

8505 Amazon

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 36
Availability Retired
8505 LEGO Technic Slizer Amazon
Retail $5.99
Value $39.62
Growth  +561.4%
Annual growth 6.7%

8506 Granite

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 34
Availability Retired
8506 LEGO Technic Slizer Granite
Retail $5.99
Value $39.16
Growth  +553.8%
Annual growth 6.0%

8507 Electro

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 37
Availability Retired
8507 LEGO Technic Slizer Electro
Retail $5.99
Value $41.88
Growth  +599.2%
Annual growth 4.9%

8508 Supplementary Discs

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 5
Availability Retired
8508 LEGO Technic Slizer Supplementary Discs
Retail $1.99
Value $21.28
Growth  +969.3%
Annual growth 5.9%

8520 Millennium Slizer

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 135
Availability Retired
8520 LEGO Technic Millennium Slizer
Retail $19.99
Value $173.52
Growth  +768.0%
Annual growth 6.8%