In 2008, LEGO released 4 Belville sets, all of these sets have been retired. For that year, the total price of all retail sets cost $153, today those sets are valued around $261, a growth of 71%.
Most valuable 2008 LEGO Belville set
7586 Sunshine Home $145.00
Highest growth 2008 Belville set
7585 Horse Stable +83.12%
Most owned 2008 Belville set
7583 Playful Puppy
4 sets

7583 Playful Puppy

Theme Belville
Year 2008
Pieces 83
Availability Retired
7583 LEGO Belville Playful Puppy
Retail $12.99
Value $15.84
Growth  +21.9%
Annual growth 2.9%

7585 Horse Stable

Theme Belville
Year 2008
Pieces / Figures 208 / 1
Availability Retired
7585 LEGO Belville Horse Stable
Retail $39.99
Value $73.23
Growth  +83.1%
Annual growth 3.0%

7586 Sunshine Home

Theme Belville
Year 2008
Pieces / Figures 450 / 3
Availability Retired
7586 LEGO Belville Sunshine Home
Retail $79.99
Value $145.00
Growth  +81.3%
Annual growth 4.7%

7587 Horse Jumping

Theme Belville
Year 2008
Pieces / Figures 54 / 1
Availability Retired
7587 LEGO Belville Horse Jumping
Retail $19.99
Value $27.08
Growth  +35.5%
Annual growth 1.8%