In 2007, LEGO released 6 City Fire sets, all of these sets have been retired. For that year, the total price of all retail sets cost $135, today those sets are valued around $430, a growth of 219%.
Most valuable 2007 LEGO City Fire set
7945 Fire Station $160.65
Highest growth 2007 City Fire set
7944 Fire Hovercraft +321.24%
Most owned 2007 City Fire set
7942 Off-Road Fire Rescue
6 sets

4938 Fire 4x4

Theme / Subtheme City / Fire
Year 2007
Pieces / Minifigs 28 / 1
Availability Retired
4938 LEGO City Fire 4x4
promotional
Value $7.34
Annual growth 2.3%

4992 Fire Boat

Theme / Subtheme City / Fire
Year 2007
Pieces / Minifigs 27 / 1
Availability Retired
4992 LEGO City Fire Boat
promotional
Value $9.72
Annual growth 4.3%

7906 Fireboat

Theme / Subtheme City / Fire
Year 2007
Pieces / Minifigs 187 / 3
Availability Retired
7906 LEGO City Fireboat
Retail $34.99
Value $105.09
Growth  +200.3%
Annual growth 4.1%

7942 Off-Road Fire Rescue

Theme / Subtheme City / Fire
Year 2007
Pieces / Minifigs 131 / 1
Availability Retired
7942 LEGO City Off-Road Fire Rescue
Retail $9.99
Value $20.93
Growth  +109.5%
Annual growth 6.1%

7944 Fire Hovercraft

Theme / Subtheme City / Fire
Year 2007
Pieces / Minifigs 274 / 3
Availability Retired
7944 LEGO City Fire Hovercraft
Retail $29.99
Value $126.33
Growth  +321.2%
Annual growth 7.3%

7945 Fire Station

Theme / Subtheme City / Fire
Year 2007
Pieces / Minifigs 600 / 4
Availability Retired
7945 LEGO City Fire Station
Retail $59.99
Value $160.65
Growth  +167.8%
Annual growth 3.2%