In 1997, LEGO released 249 sets across 18 themes, all of these sets have been retired. January saw the release of the most sets, with a total of 20. For that year, the total price of all retail sets cost $4,575, today those sets are valued around $31,877, a growth of 597%.
Most valuable 1997 LEGO set
6281 Pirates Perilous Pitfall $1,643.86
Highest growth 1997 set
6250 Cross Bone Clipper +4576.84%
Largest 1997 LEGO set
8479 Barcode Multi-Set 1,280 pieces
Most owned 1997 set
6007 Bat Lord
1997 extended Aquazone with Hydronauts and Stingrays and delivered realistic ocean exploration via Divers. UFO pushed Space toward sci-fi aliens with light-and-sound. (Adventurers would debut the following year in 1998.)
1 to 50 of 249 sets

54 UFO Action Pack

Theme / Subtheme Space / UFO
Year 1997
Pieces 96
Availability Retired
54 LEGO UFO Action Pack
Retail $7.99
Value $176.79
Growth  +2112.6%
Annual growth 11.3%

1739 Penguin

Theme Duplo
Year 1997
Pieces 8
Availability Retired
1739 LEGO Duplo Penguin
promotional
Value $10.00
Annual growth 2.2%

1781 Dino Babies

Theme Duplo
Year 1997
Pieces 90
Availability Retired
1781 LEGO Duplo Dino Babies
Retail $19.99
Value $161.78
Growth  +709.3%
Annual growth 7.5%

1782 Discovery Station

Theme / Subtheme Town / Divers
Year 1997
Pieces / Minifigs 322 / 5
Availability Retired
1782 LEGO Divers Discovery Station
Retail $49.99
Value $372.66
Growth  +645.5%
Annual growth 5.9%

1783 Primo Rattle

Theme Primo
Year 1997
Pieces 2
Availability Retired
1783 LEGO Primo Rattle
Retail $1.00
Value $14.99
Growth  +1399.0%
Annual growth 9.8%

1824 Flying Duck

Theme Basic
Year 1997
Pieces / Minifigs 17 / 1
Availability Retired
1824 LEGO Flying Duck
promotional
Value $5.35
Annual growth 10.4%

1825 Racing Car

Theme Basic
Year 1997
Pieces 19
Availability Retired
1825 LEGO Racing Car
promotional
Value $9.19
Annual growth 4.2%

1826 Bird or Boat or Plane

Theme Basic
Year 1997
Pieces 19
Availability Retired
1826 LEGO Bird or Boat or Plane
promotional
Value $7.22
Annual growth 3.7%

1827 Helicopter

Theme Basic
Year 1997
Pieces 19
Availability Retired
1827 LEGO Helicopter
promotional
Value $6.20
Annual growth 8.3%

1867 Medium Bulk Bucket

Theme Basic
Year 1997
Pieces 400
Availability Retired
1867 LEGO Medium Bulk Bucket
Retail $15.99
Value $78.99
Growth  +394.0%
Annual growth 4.5%

2003 Jumbo Building Bag

Theme Primo
Year 1997
Pieces / Minifigs 80 / 1
Availability Retired
2003 LEGO Primo Jumbo Building Bag
Retail $24.99
Value $116.90
Growth  +367.8%
Annual growth 5.5%

2009-2 Large Bulk Box

Theme Primo
Year 1997
Pieces 25
Availability Retired
2009-2 LEGO Primo Large Bulk Box
Retail $19.99
Value $234.97
Growth  +1075.4%
Annual growth 5.9%

2010 Baby Walker

Theme Primo
Year 1997
Pieces / Minifigs 14 / 1
Availability Retired
2010 LEGO Primo Baby Walker
Retail $29.99
Value $116.45
Growth  +288.3%
Annual growth 4.7%

2081 Stack 'n' Learn Starter Set

Theme Primo
Year 1997
Pieces 6
Availability Retired
2081 LEGO Primo Stack 'n' Learn Starter Set
Retail $3.99
Value $18.25
Growth  +357.4%
Annual growth 5.3%

2083 Medium Stack 'n' Learn Set

Theme Primo
Year 1997
Pieces / Minifigs 8 / 1
Availability Retired
2083 LEGO Primo Medium Stack 'n' Learn Set
Retail $7.99
Value $60.97
Growth  +663.1%
Annual growth 7.3%

2085 Frederick Frog

Theme Primo
Year 1997
Pieces 13
Availability Retired
2085 LEGO Primo Frederick Frog
Retail $9.99
Value $57.28
Growth  +473.4%
Annual growth 6.1%

2087 Polly Parrot Storage Bird

Theme Primo
Year 1997
Pieces 18
Availability Retired
2087 LEGO Primo Polly Parrot Storage Bird
Retail $14.99
Value $83.07
Growth  +454.2%
Annual growth 6.1%

2089 Stack 'n' Learn Gift Set

Theme Primo
Year 1997
Pieces / Minifigs 23 / 1
Availability Retired
2089 LEGO Primo Stack 'n' Learn Gift Set
Retail $19.99
Value $133.48
Growth  +567.7%
Annual growth 6.6%

2093 The Ladybird Rattle

Theme Primo
Year 1997
Pieces 1
Availability Retired
2093 LEGO Primo The Ladybird Rattle
Retail $2.99
Value $103.32
Growth  +3355.5%
Annual growth 9.4%

2094 Cozy Duck

Theme Primo
Year 1997
Pieces 2
Availability Retired
2094 LEGO Primo Cozy Duck
Retail $9.99
Value $21.03
Growth  +110.5%
Annual growth 2.5%

2095 Roll 'n' Play Ball

Theme Primo
Year 1997
Pieces 2
Availability Retired
2095 LEGO Primo Roll 'n' Play Ball
Retail $4.99
Value $46.29
Growth  +827.7%
Annual growth 7.8%

2096 Stack-a-Mouse

Theme Primo
Year 1997
Pieces 6
Availability Retired
2096 LEGO Primo Stack-a-Mouse
Retail $8.99
Value $14.86
Growth  +65.3%
Annual growth 1.7%

2097 Caterpillar and Friends

Theme Primo
Year 1997
Pieces 3
Availability Retired
2097 LEGO Primo Caterpillar and Friends
Retail $9.99
Value $50.79
Growth  +408.4%
Annual growth 5.6%

2098 Bathtime Boat

Theme Primo
Year 1997
Pieces / Minifigs 2 / 1
Availability Retired
2098 LEGO Primo Bathtime Boat
Retail $9.99
Value $50.29
Growth  +403.4%
Annual growth 5.6%

2099 The Shape Sorter

Theme Primo
Year 1997
Pieces 10
Availability Retired
2099 LEGO Primo The Shape Sorter
Retail $14.99
Value $98.09
Growth  +554.4%
Annual growth 6.5%

2121 Stomper

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 11
Availability Retired
2121 LEGO Stomper
promotional
Value $1.89
Annual growth 2.2%

2122 Bob

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 14
Availability Retired
2122 LEGO Bob
promotional
Value $23.31
Annual growth 1.4%

2123 Spinner

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 12
Availability Retired
2123 LEGO Spinner
promotional
Value $8.42
Annual growth 7.6%

2124 Green Bucket

Theme / Subtheme Duplo / Building Sets
Year 1997
Pieces / Duplo figures 39 / 1
Availability Retired
2124 LEGO Duplo Green Bucket
Retail $7.99
Value $11.45
Growth  +43.3%
Annual growth 1.2%

2125 Large Bucket

Theme / Subtheme Duplo / Building Sets
Year 1997
Pieces / Duplo figures 70 / 1
Availability Retired
2125 LEGO Duplo Large Bucket
Retail $12.99
Value $38.54
Growth  +196.7%
Annual growth 6.1%

2126 Train Cars

Theme / Subtheme Trains / 9V
Year 1997
Pieces / Minifigs 378 / 5
Availability Retired
2126 LEGO Train Cars
Retail $69.50
Value $399.60
Growth  +475.0%
Annual growth 5.2%

2127 Nanas

Theme Basic
Year 1997
Pieces 13
Availability Retired
2127 LEGO Nanas
promotional
Value $10.22
Annual growth 7.1%

2129 Blast-Off Dragster

Theme Technic
Year 1997
Pieces 63
Availability Retired
2129 LEGO Technic Blast-Off Dragster
Retail $6.99
Value $32.40
Growth  +363.5%
Annual growth 2.8%

2135 Aeroplane

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 9
Availability Retired
2135 LEGO Aeroplane
promotional
Value $3.07
Annual growth 5.8%

2136 Aeroplane

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 11
Availability Retired
2136 LEGO Aeroplane
promotional
Value $3.09
Annual growth 10.5%

2137 Swamp Boat

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 8
Availability Retired
2137 LEGO Swamp Boat
promotional
Value $6.37
Annual growth 5.0%

2138 Helicopter

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 8
Availability Retired
2138 LEGO Helicopter
promotional
Value $7.13
Annual growth 6.6%

2139 Boat

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 12
Availability Retired
2139 LEGO Boat
promotional
Value $3.56
Annual growth 9.9%

2147 Dragon Fly

Theme / Subtheme Town / Promotional
Year 1997
Pieces / Minifigs 183 / 2
Availability Retired
2147 LEGO Dragon Fly
Retail $27.99
Value $44.68
Growth  +59.6%
Annual growth 1.8%

2148 LEGO Truck

Theme / Subtheme Town / Vehicles
Year 1997
Pieces / Minifigs 105 / 1
Availability Retired
2148 LEGO Truck
Retail $10.99
Value $119.15
Growth  +984.2%
Annual growth 6.4%

2149 Color Line Container Lorry

Theme / Subtheme Town / Promotional
Year 1997
Pieces / Minifigs 191 / 1
Availability Retired
2149 LEGO Color Line Container Lorry
promotional
Value $308.20
Annual growth 3.4%

2151 Robo Raider

Theme / Subtheme Space / RoboForce
Year 1997
Pieces / Minifigs 136 / 1
Availability Retired
2151 LEGO RoboForce Robo Raider
Retail $11.99
Value $101.00
Growth  +742.4%
Annual growth 7.1%

2152 Robo Raptor

Theme / Subtheme Space / RoboForce
Year 1997
Pieces / Minifigs 221 / 1
Availability Retired
2152 LEGO RoboForce Robo Raptor
Retail $19.99
Value $108.05
Growth  +440.5%
Annual growth 6.0%

2153 Robo Stalker

Theme / Subtheme Space / RoboForce
Year 1997
Pieces / Minifigs 280 / 2
Availability Retired
2153 LEGO RoboForce Robo Stalker
Retail $29.99
Value $217.67
Growth  +625.8%
Annual growth 5.9%

2154 Robo Master

Theme / Subtheme Space / RoboForce
Year 1997
Pieces / Minifigs 366 / 2
Availability Retired
2154 LEGO RoboForce Robo Master
Retail $35.99
Value $319.36
Growth  +787.4%
Annual growth 4.8%

2160 Crystal Scavenger

Theme / Subtheme Aquazone / Aquaraiders
Year 1997
Pieces / Minifigs 110 / 1
Availability Retired
2160 LEGO Aquazone Aquaraiders Crystal Scavenger
Retail $14.99
Value $174.13
Growth  +1061.6%
Annual growth 7.2%

2161 Aqua Dozer

Theme / Subtheme Aquazone / Aquaraiders
Year 1997
Pieces / Minifigs 136 / 1
Availability Retired
2161 LEGO Aquazone Aquaraiders Aqua Dozer
Retail $24.99
Value $197.82
Growth  +691.6%
Annual growth 5.0%

2162 Hydro Reef Wrecker

Theme / Subtheme Aquazone / Aquaraiders
Year 1997
Pieces / Minifigs 287 / 2
Availability Retired
2162 LEGO Aquazone Aquaraiders Hydro Reef Wrecker
Retail $39.99
Value $272.67
Growth  +581.8%
Annual growth 4.8%

2163 Toucan

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 9
Availability Retired
2163 LEGO Toucan
promotional
Value $7.82
Annual growth 4.9%

2164 Whale

Theme / Subtheme Basic / FreeStyle
Year 1997
Pieces 9
Availability Retired
2164 LEGO Whale
promotional
Value $3.44
Annual growth 9.6%