In 1997, LEGO released 3 Town Promotional sets, all of these sets have been retired. For that year, the total price of all retail sets cost $28, today those sets are valued around $495, a growth of 1768%.
Most valuable 1997 LEGO Town Promotional set
2181 Infomaniac $238.99
Highest growth 1997 Town Promotional set
2147 Dragon Fly +57.34%
Largest 1997 LEGO Town Promotional set
2149 Color Line Container Lorry 191 pieces
Theme / Subtheme Town / Promotional
Year 1997
Pieces / Minifigs 183 / 2
Availability Retired
2147 LEGO Dragon Fly
Retail $27.99
Value $44.04
Growth  57.3%
Annual growth 2.2%
Theme / Subtheme Town / Promotional
Year 1997
Pieces / Minifigs 191 / 1
Availability Retired
2149 LEGO Color Line Container Lorry
promotional
Value $211.82
Annual growth 3.3%
Theme / Subtheme Town / Promotional
Year 1997
Pieces / Minifigs 4 / 1
Availability Retired
2181 LEGO Infomaniac
promotional
Value $238.99
Annual growth 12.4%