In 2005, LEGO released 2 Trains 9V sets, all of these sets have been retired. For that year, the total price of all retail sets cost $80, today those sets are valued around $1,039, a growth of 1199%.
Most valuable 2005 LEGO Trains 9V set
10133 Burlington Northern Santa Fe BNSF Locomotive $649.39
2 sets

10133 Burlington Northern Santa Fe BNSF Locomotive

Theme / Subtheme Trains / 9V
Year 2005
Pieces / Minifigs 407 / 2
Availability Retired
10133 LEGO Trains Burlington Northern Santa Fe BNSF Locomotive
Retail $39.99
Value $649.39
Growth  +1523.9%
Annual growth 7.0%

10170 TTX Intermodal Double-Stack Car

Theme / Subtheme Trains / 9V
Year 2005
Pieces 366
Availability Retired
10170 LEGO Trains TTX Intermodal Double-Stack Car
Retail $39.99
Value $389.47
Growth  +873.9%
Annual growth 7.3%