Vikings consists of 7 sets that ran from 2005 to 2006. Most sets were released in 2005 which accounted for 5 sets. As of today, the average annual growth of sets in Vikings is approximately 7.2% per year.
Most valuable Vikings set
7019 Viking Fortress vs. the Fafnir Dragon $708.27
Highest growth Vikings set
7016 Viking Boat vs. the Wyvern Dragon +1385.19%
The LEGO Vikings theme is based on the ancient Scandinavian warriors known as Vikings. Released in 2005 and later discontinued in 2007, Vikings featured seven sets in total. Each set in the theme was based around a storyline that featured warriors battling creatures, typically based on Norse mythology. These creatures were constructed in a BIONICLE-like style that contrasted with the minifigure Vikings that battled them.
7 sets

7021 Viking Double Catapult vs. the Armored Ofnir Dragon

Theme Vikings
Year 2006
Pieces / Minifigs 505 / 3
Availability Retired
7021 LEGO Viking Double Catapult vs. the Armored Ofnir Dragon
Retail $39.99
Value $169.13
Growth  +322.9%
Annual growth 5.5%

7020 Army of Vikings with Heavy Artillery Wagon

Theme Vikings
Year 2006
Pieces / Minifigs 312 / 7
Availability Retired
7020 LEGO Army of Vikings with Heavy Artillery Wagon
Retail $29.99
Value $166.37
Growth  +454.8%
Annual growth 6.9%

7019 Viking Fortress vs. the Fafnir Dragon

Theme Vikings
Year 2005
Pieces / Minifigs 1,019 / 6
Availability Retired
7019 LEGO Viking Fortress vs. the Fafnir Dragon
Retail $69.99
Value $708.27
Growth  +912.0%
Annual growth 8.5%

7018 Viking Ship vs. the Midgard Serpent

Theme Vikings
Year 2005
Pieces / Minifigs 578 / 6
Availability Retired
7018 LEGO Viking Ship vs. the Midgard Serpent
Retail $49.99
Value $546.33
Growth  +992.9%
Annual growth 8.3%

7017 Viking Catapult vs. the Nidhogg Dragon

Theme Vikings
Year 2005
Pieces / Minifigs 225 / 2
Availability Retired
7017 LEGO Viking Catapult vs. the Nidhogg Dragon
Retail $19.99
Value $187.54
Growth  +838.2%
Annual growth 7.2%

7016 Viking Boat vs. the Wyvern Dragon

Theme Vikings
Year 2005
Pieces / Minifigs 112 / 2
Availability Retired
7016 LEGO Viking Boat vs. the Wyvern Dragon
Retail $9.99
Value $148.37
Growth  +1385.2%
Annual growth 9.5%

7015 Viking Warrior vs. the Fenris Wolf

Theme Vikings
Year 2005
Pieces / Minifigs 76 / 1
Availability Retired
7015 LEGO Viking Warrior vs. the Fenris Wolf
Retail $4.99
Value $53.12
Growth  +964.5%
Annual growth 7.9%