In 1995, LEGO released 4 Duplo Primo sets, all of these sets have been retired. For that year, the total price of all retail sets cost $46, today those sets are valued around $272, a growth of 491%.
Most valuable 1995 LEGO Duplo Primo set
2082 Medium Stack 'n' Learn Set $120.01
Largest 1995 LEGO Duplo Primo set
2086 XLarge Stack 'n' Learn Set 18 pieces
Most owned 1995 Duplo Primo set
2084 Large Stack 'n' Learn Set
4 sets

2080 Stacking Blocks One

Theme / Subtheme Duplo / Primo
Year 1995
Pieces 9
Availability Retired
2080 LEGO Duplo Primo Stacking Blocks One
Retail $6.99
Value $30.03
Growth  +329.6%
Annual growth 6.8%

2082 Medium Stack 'n' Learn Set

Theme / Subtheme Duplo / Primo
Year 1995
Pieces / Duplo figures 9 / 1
Availability Retired
2082 LEGO Duplo Primo Medium Stack 'n' Learn Set
Retail $9.99
Value $120.01
Growth  +1101.3%
Annual growth 8.4%

2084 Large Stack 'n' Learn Set

Theme / Subtheme Duplo / Primo
Year 1995
Pieces / Duplo figures 14 / 1
Availability Retired
2084 LEGO Duplo Primo Large Stack 'n' Learn Set
Retail $12.99
Value $59.66
Growth  +359.3%
Annual growth 5.0%

2086 XLarge Stack 'n' Learn Set

Theme / Subtheme Duplo / Primo
Year 1995
Pieces / Duplo figures 18 / 2
Availability Retired
2086 LEGO Duplo Primo XLarge Stack 'n' Learn Set
Retail $15.99
Value $61.83
Growth  +286.7%
Annual growth 4.5%