India, Nov. 11 -- A 27-year-old entrepreneur who joined the volunteer fire service at just 15 has built a startup valued at $225 million after quitting his job at Goldman Sachs. Martin Hunt, who started volunteering at a fire department in Delaware, US, is now the co-founder of Garage, an online marketplace that helps fire departments and local governments buy and sell used emergency vehicles and heavy equipment.

(Also read: Techie quits Rs.75 LPA job to build startup, but loses 'every customer in 30 days')

According to a Fortune report published on November 10, Garage recently raised $41 million in Series B funding led by Invus Opportunities. The investment values the startup at $225 million and brings its total funding to $60 million....