In 1977, LEGO released 13 LEGOLAND sets across 3 subthemes, all of these sets have been retired. Subthemes for that year included Boats, Town, and Vehicle. For that year, the total price of all retail sets cost $72, today those sets are valued around $3,673, a growth of 4985%.
Most valuable 1977 LEGOLAND set
373 Offshore Rig with Fuel Tanker $653.62
Highest growth 1977 LEGOLAND set
492 Truck with Payloader +27677.78%
Most owned 1977 LEGOLAND set
619 Rally Car
13 sets

371-3 Sea Plane

Theme / Subtheme LEGOLAND / Town
Year 1977
Pieces / Minifigs 47 / 2
Availability Retired
371-3 LEGOLAND Town Sea Plane
Retail $3.49
Value $262.47
Growth  +7420.6%
Annual growth 9.4%

373 Offshore Rig with Fuel Tanker

Theme / Subtheme LEGOLAND / Boats
Year 1977
Pieces / Minifigs 460 / 3
Availability Retired
373 LEGOLAND Boats Offshore Rig with Fuel Tanker
Retail $24.99
Value $653.62
Growth  +2515.5%
Annual growth 7.0%

456 Spirit of St. Louis

Theme LEGOLAND
Year 1977
Pieces 49
Availability Retired
456 LEGOLAND Spirit of St. Louis
Retail $9.99
Value $214.69
Growth  +2049.0%
Annual growth 3.3%

491 Formula 1 Racer

Theme / Subtheme LEGOLAND / Town
Year 1977
Pieces 67
Availability Retired
491 LEGOLAND Town Formula 1 Racer
Retail $2.99
Value $149.00
Growth  +4883.3%
Annual growth 4.5%

492 Truck with Payloader

Theme LEGOLAND
Year 1977
Pieces / Minifigs 45 / 2
Availability Retired
492 LEGOLAND Truck with Payloader
Retail $1.35
Value $375.00
Growth  +27677.8%
Annual growth 10.4%

618 Police Helicopter

Theme LEGOLAND
Year 1977
Pieces 39
Availability Retired
618 LEGOLAND Police Helicopter
Retail $5.49
Value $78.09
Growth  +1322.4%
Annual growth 6.2%

619 Rally Car

Theme / Subtheme LEGOLAND / Vehicle
Year 1977
Pieces / Minifigs 18 / 1
Availability Retired
619 LEGOLAND Rally Car
Retail $4.49
Value $179.98
Growth  +3908.5%
Annual growth 6.1%

663 Hovercraft

Theme / Subtheme LEGOLAND / Vehicle
Year 1977
Pieces 60
Availability Retired
663 LEGOLAND Hovercraft
Retail $5.49
Value $348.17
Growth  +6241.9%
Annual growth 9.0%

664 TV Crew

Theme LEGOLAND
Year 1977
Pieces / Minifigs 46 / 3
Availability Retired
664 LEGOLAND TV Crew
Retail $4.49
Value $96.65
Growth  +2052.6%
Annual growth 6.6%

698 Boeing Aeroplane

Theme LEGOLAND
Year 1977
Pieces 46
Availability Retired
698 LEGOLAND Boeing Aeroplane
promotional
Value $279.19
Annual growth 4.3%

699 Photo Safari

Theme LEGOLAND
Year 1977
Pieces / Minifigs 130 / 1
Availability Retired
699 LEGOLAND Photo Safari
Retail $3.49
Value $141.63
Growth  +3958.2%
Annual growth 4.1%

711 Jeep CJ-5

Theme LEGOLAND
Year 1977
Pieces 63
Availability Retired
711 LEGOLAND Jeep CJ-5
Retail $2.99
Value $400.00
Growth  +13277.9%
Annual growth 8.3%

712 Sea Plane

Theme LEGOLAND
Year 1977
Pieces / Minifigs 115 / 2
Availability Retired
712 LEGOLAND Sea Plane
Retail $2.99
Value $494.76
Growth  +16447.2%
Annual growth 8.9%