In 2003, LEGO released 6 Bulk Bricks sets across 2 subthemes, all of these sets have been retired. Subthemes for that year included Seasonal and Technic. For that year, the total price of all retail sets cost $59, today those sets are valued around $112.
Most valuable 2003 LEGO Bulk Bricks set
10077 Technic Motor $34.15
Highest growth 2003 Bulk Bricks set
10042 U.S. Flag +500.67%
Largest 2003 LEGO Bulk Bricks set
10073 Technic Bushes 130 pieces
6 sets

10042 U.S. Flag

Theme / Subtheme Bulk Bricks / Seasonal
Year 2003
Pieces 35
Availability Retired
10042 LEGO U.S. Flag
Retail $2.99
Value $17.96
Growth  +500.7%
Annual growth 3.9%

10072 Technic Beams

Theme / Subtheme Bulk Bricks / Technic
Year 2003
Pieces 56
Availability Retired
10072 LEGO Technic Beams
Retail $9.99

10073 Technic Bushes

Theme / Subtheme Bulk Bricks / Technic
Year 2003
Pieces 130
Availability Retired
10073 LEGO Technic Bushes
Retail $9.99
Value $10.98
Growth  +9.9%

10074 Technic Cross Axles

Theme / Subtheme Bulk Bricks / Technic
Year 2003
Pieces 68
Availability Retired
10074 LEGO Technic Cross Axles
Retail $9.99
Value $18.99
Growth  +90.1%
Annual growth 3.0%

10076 Technic Gear Wheels

Theme / Subtheme Bulk Bricks / Technic
Year 2003
Pieces 37
Availability Retired
10076 LEGO Technic Gear Wheels
Retail $12.99
Value $29.99
Growth  +130.9%
Annual growth 3.9%

10077 Technic Motor

Theme / Subtheme Bulk Bricks / Technic
Year 2003
Pieces 55
Availability Retired
10077 LEGO Technic Motor
Retail $12.99
Value $34.15
Growth  +162.9%
Annual growth 4.7%