In 1991, LEGO released 25 Town sets across 11 subthemes, all of these sets have been retired. Subthemes for that year included Boats, Coastguard, Construction, Fire, Flight, Maintenance, Monorail, Police, Promotional, Racing, and Vehicles. For that year, the total price of all retail sets cost $451, today those sets are valued around $6,824, a growth of 1413%.
Most valuable 1991 LEGO Town set
6542 Launch & Load Seaport $989.15
Highest growth 1991 Town set
1477 Red Race Car Number 3 +7868.90%
Most owned 1991 Town set
6679 Dark Shark
25 sets

1475 Airport Security Squad

Theme / Subtheme Town / Flight
Year 1991
Pieces / Minifigs 123 / 2
Availability Retired
1475 LEGO Flight Airport Security Squad
Retail $9.99
Value $251.20
Growth  +2414.5%
Annual growth 5.6%

1477 Red Race Car Number 3

Theme / Subtheme Town / Racing
Year 1991
Pieces / Minifigs 39 / 1
Availability Retired
1477 LEGO Racing Red Race Car Number 3
Retail $2.99
Value $238.27
Growth  +7868.9%
Annual growth 13.3%

1610 Police Car

Theme / Subtheme Town / Police
Year 1991
Pieces 23
Availability Retired
1610 LEGO Police Car
Retail $1.49
Value $27.55
Growth  +1749.0%
Annual growth 5.2%

1611 Red Race Car

Theme / Subtheme Town / Racing
Year 1991
Pieces 21
Availability Retired
1611 LEGO Racing Red Race Car
Retail $1.99
Value $23.87
Growth  +1099.5%
Annual growth 6.1%

1656 Evacuation Team

Theme / Subtheme Town / Fire
Year 1991
Pieces / Minifigs 236 / 2
Availability Retired
1656 LEGO Fire Evacuation Team
Retail $29.49
Value $250.00
Growth  +747.7%
Annual growth 3.9%

1772 Airport Container Truck

Theme / Subtheme Town / Promotional
Year 1991
Pieces / Minifigs 80 / 1
Availability Retired
1772 LEGO Airport Container Truck
promotional
Value $880.06
Annual growth 11.9%

1773 Airline Maintenance Vehicle with Trailer

Theme / Subtheme Town / Promotional
Year 1991
Pieces / Minifigs 109 / 1
Availability Retired
1773 LEGO Airline Maintenance Vehicle with Trailer
promotional
Value $202.80
Annual growth 7.8%

1774 Aircraft

Theme / Subtheme Town / Promotional
Year 1991
Pieces / Minifigs 137 / 2
Availability Retired
1774 LEGO Aircraft
Retail $24.99
Value $727.44
Growth  +2810.9%
Annual growth 10.1%

6347 Monorail Accessory Track

Theme / Subtheme Town / Monorail
Year 1991
Pieces 54
Availability Retired
6347 LEGO Monorail Accessory Track
Retail $34.99
Value $445.33
Growth  +1172.7%
Annual growth 6.4%

6352 Cargomaster Crane

Theme / Subtheme Town / Vehicles
Year 1991
Pieces / Minifigs 140 / 1
Availability Retired
6352 LEGO Cargomaster Crane
Retail $12.75
Value $149.75
Growth  +1074.5%
Annual growth 7.2%

6353 Coastal Cutter

Theme / Subtheme Town / Coastguard
Year 1991
Pieces / Minifigs 185 / 2
Availability Retired
6353 LEGO Coastguard Coastal Cutter
Retail $19.00
Value $150.00
Growth  +689.5%
Annual growth 3.7%

6430 Night Patroller

Theme / Subtheme Town / Police
Year 1991
Pieces / Minifigs 140 / 1
Availability Retired
6430 LEGO Police Night Patroller
Retail $24.99
Value $299.84
Growth  +1099.8%
Annual growth 4.3%

6440 Jetport Fire Squad

Theme / Subtheme Town / Fire
Year 1991
Pieces / Minifigs 159 / 2
Availability Retired
6440 LEGO Jetport Fire Squad
Retail $27.50
Value $380.27
Growth  +1282.8%
Annual growth 6.1%

6509 Red Devil Racer

Theme / Subtheme Town / Racing
Year 1991
Pieces / Minifigs 39 / 1
Availability Retired
6509 LEGO Racing Red Devil Racer
Retail $1.99
Value $30.45
Growth  +1430.2%
Annual growth 5.7%

6510 Mud Runner

Theme / Subtheme Town / Vehicles
Year 1991
Pieces / Minifigs 34 / 1
Availability Retired
6510 LEGO Mud Runner
Retail $3.25
Value $31.89
Growth  +881.2%
Annual growth 4.3%

6531 Flame Chaser

Theme / Subtheme Town / Fire
Year 1991
Pieces / Minifigs 55 / 1
Availability Retired
6531 LEGO Fire Flame Chaser
Retail $7.49
Value $35.41
Growth  +372.8%
Annual growth 8.3%

6532 Diesel Dumper

Theme / Subtheme Town / Construction
Year 1991
Pieces / Minifigs 46 / 1
Availability Retired
6532 LEGO Construction Diesel Dumper
Retail $5.49
Value $70.61
Growth  +1186.2%
Annual growth 7.5%

6540 Pier Police

Theme / Subtheme Town / Police
Year 1991
Pieces / Minifigs 352 / 4
Availability Retired
6540 LEGO Pier Police
Retail $44.00
Value $320.00
Growth  +627.3%
Annual growth 3.5%

6541 Intercoastal Seaport

Theme / Subtheme Town / Boats
Year 1991
Pieces / Minifigs 545 / 5
Availability Retired
6541 LEGO Boats Intercoastal Seaport
Retail $63.75
Value $710.88
Growth  +1015.1%
Annual growth 6.5%

6542 Launch & Load Seaport

Theme / Subtheme Town / Boats
Year 1991
Pieces / Minifigs 1,080 / 7
Availability Retired
6542 LEGO Boats Launch & Load Seaport
Retail $89.50
Value $989.15
Growth  +1005.2%
Annual growth 3.7%

6593 Blaze Battler

Theme / Subtheme Town / Fire
Year 1991
Pieces / Minifigs 126 / 1
Availability Retired
6593 LEGO Fire Blaze Battler
Retail $14.99
Value $129.49
Growth  +763.8%
Annual growth 4.5%

6645 Street Sweeper

Theme / Subtheme Town / Maintenance
Year 1991
Pieces / Minifigs 65 / 2
Availability Retired
6645 LEGO Street Sweeper
Retail $6.99
Value $199.16
Growth  +2749.2%
Annual growth 4.8%

6646 Screaming Patriot

Theme / Subtheme Town / Racing
Year 1991
Pieces / Minifigs 65 / 1
Availability Retired
6646 LEGO Racing Screaming Patriot
Retail $6.75
Value $105.52
Growth  +1463.3%
Annual growth 5.5%

6669 Diesel Daredevil

Theme / Subtheme Town / Vehicles
Year 1991
Pieces / Minifigs 90 / 1
Availability Retired
6669 LEGO Diesel Daredevil
Retail $8.75
Value $77.14
Growth  +781.6%
Annual growth 5.6%

6679 Dark Shark

Theme / Subtheme Town / Boats
Year 1991
Pieces / Minifigs 83 / 2
Availability Retired
6679 LEGO Boats Dark Shark
Retail $7.75
Value $97.81
Growth  +1162.1%
Annual growth 6.3%