In 2001, LEGO released 2 Basic sets, all of these sets have been retired. For that year, the total price of all retail sets cost $21, today those sets are valued around $54, a growth of 151%.
Most valuable 2001 LEGO Basic set
4112 Basic Building Set $30.14
Highest growth 2001 Basic set
3197 Aircraft +1491.28%
2 sets

3197 Aircraft

Theme Basic
Year 2001
Pieces 15
Availability Retired
3197 LEGO Aircraft
Retail $1.49
Value $23.71
Growth  +1491.3%
Annual growth 9.3%

4112 Basic Building Set

Theme Basic
Year 2001
Pieces 201
Availability Retired
4112 LEGO Basic Building Set
Retail $19.99
Value $30.14
Growth  +50.8%
Annual growth 1.7%