In 2005, LEGO released 5 Duplo Building Sets sets, all of these sets have been retired. For that year, the total price of all retail sets cost $78, today those sets are valued around $191.
Most valuable 2005 LEGO Duplo Building Sets set
5352-2 50th Anniversary Tub $76.27
Most owned 2005 Duplo Building Sets set
4422 Handy Box
Theme / Subtheme Duplo / Building Sets
Year 2005
Pieces 90
Availability Retired
4085-2 LEGO Duplo 50th Anniversary Bucket
Retail $19.99
Value $60.83
Growth  204.3%
Annual growth 4.2%
Theme / Subtheme Duplo / Building Sets
Year 2005
Pieces 120
Availability Retired
4422 LEGO Duplo Handy Box
Retail $14.99
Value $37.76
Growth  151.9%
Annual growth 5.0%
Theme / Subtheme Duplo / Building Sets
Year 2005
Pieces 139
Availability Retired
5352-2 LEGO Duplo 50th Anniversary Tub
Retail $19.99
Value $76.27
Growth  281.5%
Annual growth 7.3%
Theme / Subtheme Duplo / Building Sets
Year 2005
Pieces 100
Availability Retired
5367 LEGO Duplo Yellow Tub
Retail $10.99
Theme / Subtheme Duplo / Building Sets
Year 2005
Pieces 120
Availability Retired
5371 LEGO Duplo Bucket Green
Retail $11.99
Value $16.61
Growth  38.5%
Annual growth 1.7%