In 2012, LEGO released 7 Marvel Super Heroes Avengers sets, all of these sets have been retired. For that year, the total price of all retail sets cost $162, today those sets are valued around $356, a growth of 120%.
Most valuable 2012 LEGO Marvel Super Heroes Avengers set
6869 Quinjet Aerial Battle $123.60
Highest growth 2012 Marvel Super Heroes Avengers set
6867 Loki's Cosmic Cube Escape +202.30%
7 sets

6865 Captain America's Avenging Cycle

Theme / Subtheme Marvel Super Heroes / Avengers
Year 2012
Pieces / Minifigs 72 / 3
Availability Retired
6865 LEGO Avengers Captain America's Avenging Cycle
Retail $12.99
Value $34.63
Growth  +166.6%
Annual growth 7.9%

6867 Loki's Cosmic Cube Escape

Theme / Subtheme Marvel Super Heroes / Avengers
Year 2012
Pieces / Minifigs 181 / 3
Availability Retired
6867 LEGO Avengers Loki's Cosmic Cube Escape
Retail $19.99
Value $60.43
Growth  +202.3%
Annual growth 5.7%

6868 Hulk's Helicarrier Breakout

Theme / Subtheme Marvel Super Heroes / Avengers
Year 2012
Pieces / Minifigs 389 / 4
Availability Retired
6868 LEGO Avengers Hulk's Helicarrier Breakout
Retail $49.99
Value $110.00
Growth  +120.0%
Annual growth 4.8%

6869 Quinjet Aerial Battle

Theme / Subtheme Marvel Super Heroes / Avengers
Year 2012
Pieces / Minifigs 735 / 5
Availability Retired
6869 LEGO Avengers Quinjet Aerial Battle
Retail $69.99
Value $123.60
Growth  +76.6%
Annual growth 2.8%

30162 Quinjet

Theme / Subtheme Marvel Super Heroes / Avengers
Year 2012
Pieces 33
Availability Retired
30162 LEGO Avengers Quinjet
promotional
Value $5.18
Annual growth 9.1%

30163 Thor and the Cosmic Cube

Theme / Subtheme Marvel Super Heroes / Avengers
Year 2012
Pieces / Minifigs 25 / 1
Availability Retired
30163 LEGO Avengers Thor and the Cosmic Cube
Retail $4.99
Value $11.43
Growth  +129.1%
Annual growth 6.1%

30165 Hawkeye with Equipment

Theme / Subtheme Marvel Super Heroes / Avengers
Year 2012
Pieces / Minifigs 24 / 1
Availability Retired
30165 LEGO Avengers Hawkeye with Equipment
Retail $3.99
Value $10.80
Growth  +170.7%
Annual growth 7.4%