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 $2,406, a growth of 332%.
Most valuable 1999 LEGO Technic set
8448 Super Street Sensation $527.98
Highest growth 1999 Technic set
1268 Bike Blaster +1076.88%
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 $29.23
Annual growth 15.2%

1257 Tricycle

Theme Technic
Year 1999
Pieces 24
Availability Retired
1257 LEGO Technic Tricycle
promotional
Value $12.79
Annual growth 5.6%

1258 Buggy

Theme Technic
Year 1999
Pieces 29
Availability Retired
1258 LEGO Technic Buggy
promotional
Value $9.43
Annual growth 4.7%

1259 Motorbike

Theme Technic
Year 1999
Pieces 28
Availability Retired
1259 LEGO Technic Motorbike
promotional
Value $12.23
Annual growth 4.9%

1260 Car

Theme Technic
Year 1999
Pieces 26
Availability Retired
1260 LEGO Technic Car
promotional
Value $18.77
Annual growth 3.1%

1268 Bike Blaster

Theme Technic
Year 1999
Pieces 28
Availability Retired
1268 LEGO Technic Bike Blaster
Retail $1.99
Value $23.42
Growth  +1076.9%
Annual growth 7.0%

3000 Tribuggy

Theme Technic
Year 1999
Pieces 24
Availability Retired
3000 LEGO Technic Tribuggy
promotional
Value $73.62
Annual growth 4.2%

3001 Propeller Buggy

Theme Technic
Year 1999
Pieces 29
Availability Retired
3001 LEGO Technic Propeller Buggy
promotional
Value $46.34
Annual growth 7.4%

3003 Bike

Theme Technic
Year 1999
Pieces 28
Availability Retired
3003 LEGO Technic Bike
promotional
Value $77.08
Annual growth 9.3%

3005 Piston Car

Theme Technic
Year 1999
Pieces 26
Availability Retired
3005 LEGO Technic Piston Car
promotional
Value $38.40
Annual growth 9.1%

8246 Hydro Racer

Theme Technic
Year 1999
Pieces 46
Availability Retired
8246 LEGO Technic Hydro Racer
Retail $3.99
Value $14.96
Growth  +274.9%
Annual growth 5.0%

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 $18.74
Growth  +134.5%
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 $39.99
Growth  +100.1%
Annual growth 3.7%

8253 Fire Helicopter

Theme Technic
Year 1999
Pieces / Figures 210 / 1
Availability Retired
8253 LEGO Technic Fire Helicopter
Retail $16.50
Value $58.90
Growth  +257.0%
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 $89.80
Growth  +499.1%
Annual growth 5.8%

8268 Scorpion Attack

Theme / Subtheme Technic / Competition
Year 1999
Pieces / Figures 85 / 1
Availability Retired
8268 LEGO Technic Scorpion Attack
Retail $14.99
Value $57.53
Growth  +283.8%
Annual growth 5.0%

8269 Cyber Stinger

Theme / Subtheme Technic / Competition
Year 1999
Pieces / Figures 345 / 1
Availability Retired
8269 LEGO Technic Cyber Stinger
Retail $39.99
Value $62.60
Growth  +56.5%
Annual growth 2.3%

8444 Air Enforcer

Theme Technic
Year 1999
Pieces 309
Availability Retired
8444 LEGO Technic Air Enforcer
Retail $29.99
Value $112.03
Growth  +273.6%
Annual growth 5.0%

8445 Indy Storm

Theme Technic
Year 1999
Pieces 446
Availability Retired
8445 LEGO Technic Indy Storm
Retail $39.99
Value $167.91
Growth  +319.9%
Annual growth 3.4%

8446 Crane Truck

Theme Technic
Year 1999
Pieces 582
Availability Retired
8446 LEGO Technic Crane Truck
Retail $59.99
Value $227.41
Growth  +279.1%
Annual growth 3.9%

8448 Super Street Sensation

Theme Technic
Year 1999
Pieces 1,437
Availability Retired
8448 LEGO Technic Super Street Sensation
Retail $129.99
Value $527.98
Growth  +306.2%
Annual growth 5.3%

8450 The Mission

Theme / Subtheme Technic / Competition
Year 1999
Pieces 643
Availability Retired
8450 LEGO Technic The Mission
Retail $99.99
Value $150.49
Growth  +50.5%
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 $68.91
Growth  +1050.4%
Annual growth 7.5%

8501 Ski

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 34
Availability Retired
8501 LEGO Technic Slizer Ski
Retail $5.99
Value $31.62
Growth  +427.9%
Annual growth 3.6%

8502 Turbo

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 45
Availability Retired
8502 LEGO Technic Slizer Turbo
Retail $5.99
Value $24.34
Growth  +306.3%
Annual growth 5.2%

8503 Scuba

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 39
Availability Retired
8503 LEGO Technic Slizer Scuba
Retail $5.99
Value $32.89
Growth  +449.1%
Annual growth 5.2%

8504 Jet

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 44
Availability Retired
8504 LEGO Technic Slizer Jet
Retail $5.99
Value $45.61
Growth  +661.4%
Annual growth 3.7%

8505 Amazon

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 36
Availability Retired
8505 LEGO Technic Slizer Amazon
Retail $5.99
Value $40.21
Growth  +571.3%
Annual growth 6.6%

8506 Granite

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 34
Availability Retired
8506 LEGO Technic Slizer Granite
Retail $5.99
Value $37.90
Growth  +532.7%
Annual growth 5.8%

8507 Electro

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 37
Availability Retired
8507 LEGO Technic Slizer Electro
Retail $5.99
Value $50.19
Growth  +737.9%
Annual growth 5.3%

8508 Supplementary Discs

Theme / Subtheme Technic / Slizer
Year 1999
Pieces 5
Availability Retired
8508 LEGO Technic Slizer Supplementary Discs
Retail $1.99
Value $21.05
Growth  +957.8%
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 $169.01
Growth  +745.5%
Annual growth 6.9%