In 2011, LEGO released 6 Duplo Cars sets, all of these sets have been retired. For that year, the total price of all retail sets cost $195, today those sets are valued around $511, a growth of 162%.
Most valuable 2011 LEGO Duplo Cars set
5839 World Grand Prix $150.00
Largest 2011 LEGO Duplo Cars set
5828 Big Bentley 67 pieces
Most owned 2011 Duplo Cars set
5829 The Pit Stop
6 sets

5817 Agent Mater

Theme / Subtheme Duplo / Cars
Year 2011
Pieces / Duplo figures 11 / 1
Availability Retired
5817 LEGO Duplo Cars Agent Mater
Retail $14.99
Value $49.99
Growth  +233.5%
Annual growth 7.1%

5818 Luigi's Italian Place

Theme / Subtheme Duplo / Cars
Year 2011
Pieces / Duplo figures 22 / 2
Availability Retired
5818 LEGO Duplo Cars Luigi's Italian Place
Retail $19.99
Value $65.95
Growth  +229.9%
Annual growth 6.7%

5819 Tokyo Racing

Theme / Subtheme Duplo / Cars
Year 2011
Pieces / Duplo figures 45 / 2
Availability Retired
5819 LEGO Duplo Cars Tokyo Racing
Retail $29.99
Value $66.43
Growth  +121.5%
Annual growth 7.3%

5828 Big Bentley

Theme / Subtheme Duplo / Cars
Year 2011
Pieces / Duplo figures 67 / 3
Availability Retired
5828 LEGO Duplo Cars Big Bentley
Retail $39.99
Value $86.17
Growth  +115.5%
Annual growth 6.3%

5829 The Pit Stop

Theme / Subtheme Duplo / Cars
Year 2011
Pieces / Duplo figures 52 / 4
Availability Retired
5829 LEGO Duplo Cars The Pit Stop
Retail $49.99
Value $92.78
Growth  +85.6%
Annual growth 5.5%

5839 World Grand Prix

Theme / Subtheme Duplo / Cars
Year 2011
Pieces / Duplo figures 35 / 3
Availability Retired
5839 LEGO Duplo Cars World Grand Prix
Retail $39.99
Value $150.00
Growth  +275.1%
Annual growth 9.7%