In 2019, LEGO released 4 Stranger Things sets, all of these sets have been retired. For that year, the total price of all retail sets cost $200, today those sets are valued around $1,741, a growth of 770%.
Most valuable 2019 LEGO Stranger Things set
San Diego Comic-Con Barb $800.00
Highest growth 2019 Stranger Things set
75810 The Upside Down +287.52%
4 sets

75810 The Upside Down

Theme Stranger Things
Year 2019
Pieces / Minifigs 2,287 / 8
Availability Retired
75810 LEGO Stranger Things The Upside Down
Retail $199.99
Value $775.00
Growth  +287.5%
Annual growth 34.4%

5005933 Stranger Things Notebook

Theme Stranger Things
Year 2019
Availability Retired
5005933 LEGO Stranger Things Notebook
promotional
Value $19.99
Annual growth 5.2%

San Diego Comic-Con Barb

Theme Stranger Things
Year 2019
Minifigs 1
Availability Retired
LEGO Stranger Things San Diego Comic-Con Barb
promotional
Value $800.00
Annual growth 12.7%

Castle Byers

Theme Stranger Things
Year 2019
Pieces 48
Availability Retired
LEGO Stranger Things Castle Byers
promotional
Value $145.69
Annual growth 13.4%