In 2007, LEGO released 2 City Trains sets, all of these sets have been retired. For that year, the total price of all retail sets cost $70, today those sets are valued around $434, a growth of 520%.
Most valuable 2007 LEGO City Trains set
7997 Train Station $218.35
Highest growth 2007 City Trains set
7996 Train Rail Crossing +763.75%
Theme / Subtheme City / Trains
Year 2007
Pieces 4
Availability Retired
7996 LEGO City Train Rail Crossing
Retail $24.99
Value $215.85
Growth  +763.7%
Annual growth 8.8%
Theme / Subtheme City / Trains
Year 2007
Pieces / Minifigs 387 / 5
Availability Retired
7997 LEGO City Train Station
Retail $44.99
Value $218.35
Growth  +385.3%
Annual growth 6.8%