In 2021, LEGO released 5 Ninjago Seabound sets, all of these sets have been retired. For that year, the total price of all retail sets cost $380, today those sets are valued around $647, a growth of 70%.
Most valuable 2021 LEGO Ninjago Seabound set
71756 Hydro Bounty $283.59
Most owned 2021 Ninjago Seabound set
71754 Water Dragon
5 sets

71750 Lloyd's Hydro Mech

Theme / Subtheme Ninjago / Seabound
Year 2021
Pieces / Minifigs 221 / 2
Availability Retired
71750 LEGO Ninjago Seabound Lloyd's Hydro Mech
Retail $19.99
Value $40.00
Growth  +100.1%
Annual growth 15.8%

71752 Ninja Sub Speeder

Theme / Subtheme Ninjago / Seabound
Year 2021
Pieces / Minifigs 346 / 4
Availability Retired
71752 LEGO Ninjago Seabound Ninja Sub Speeder
Retail $39.99
Value $49.25
Growth  +23.2%
Annual growth 6.1%

71754 Water Dragon

Theme / Subtheme Ninjago / Seabound
Year 2021
Pieces / Minifigs 720 / 5
Availability Retired
71754 LEGO Ninjago Seabound Water Dragon
Retail $79.99
Value $124.61
Growth  +55.8%
Annual growth 14.1%

71755 Temple of the Endless Sea

Theme / Subtheme Ninjago / Seabound
Year 2021
Pieces / Minifigs 1,035 / 7
Availability Retired
71755 LEGO Ninjago Seabound Temple of the Endless Sea
Retail $99.99
Value $150.00
Growth  +50.0%
Annual growth 9.7%

71756 Hydro Bounty

Theme / Subtheme Ninjago / Seabound
Year 2021
Pieces / Minifigs 1,159 / 10
Availability Retired
71756 LEGO Ninjago Seabound Hydro Bounty
Retail $139.99
Value $283.59
Growth  +102.6%
Annual growth 18.3%