In 1978, LEGO released 4 Basic Supplementaries sets, all of these sets have been retired. For that year, the total price of all retail sets cost $20, today those sets are valued around $98, a growth of 380%.
Most valuable 1978 LEGO Basic Supplementaries set
970 Lighting Bricks $37.61
Highest growth 1978 Basic Supplementaries set
747 Baseplates, Red and Blue +573.77%
4 sets

745 Baseplate, Green

Theme / Subtheme Basic / Supplementaries
Year 1978
Pieces 1
Availability Retired
745 LEGO Baseplate, Green
Retail $4.25
Value $12.00
Growth  +182.4%
Annual growth 2.3%

746 Baseplates, Green and Yellow

Theme / Subtheme Basic / Supplementaries
Year 1978
Pieces 2
Availability Retired
746 LEGO Baseplates, Green and Yellow
Retail $3.85
Value $22.64
Growth  +488.1%
Annual growth 3.8%

747 Baseplates, Red and Blue

Theme / Subtheme Basic / Supplementaries
Year 1978
Pieces 2
Availability Retired
747 LEGO Baseplates, Red and Blue
Retail $3.85
Value $25.94
Growth  +573.8%
Annual growth 3.5%

970 Lighting Bricks

Theme / Subtheme Basic / Supplementaries
Year 1978
Pieces 17
Availability Retired
970 LEGO Lighting Bricks
Retail $8.50
Value $37.61
Growth  +342.5%
Annual growth 4.6%