In 1999, LEGO released 2 Promotional sets across 2 subthemes, all of these sets have been retired. Subthemes for that year included Ferries and Miscellaneous.
Most valuable 1999 LEGO Promotional set
1054 Stena Line Ferry $149.99
2 sets

1054 Stena Line Ferry

Theme / Subtheme Promotional / Ferries
Year 1999
Pieces 212
Availability Retired
1054 LEGO Stena Line Ferry
promotional
Value $149.99
Annual growth 1.2%

BAU MIT!

Theme / Subtheme Promotional / Miscellaneous
Year 1999
Pieces 1
Availability Retired
LEGO BAU MIT!
promotional
Value $11.26
Annual growth 11.2%