Business Standard: Used car business online is taking off if these numbers are any indication. Last year, eBay India was selling 18 cars a day. Now that has gone upto one car every 10 minutes. That's about 400 cars a day, but it's mostly business to business sale. In the b2c segment, one car is sold every nine hours. If you are interested in numbers, the used car business online offers an estimated business opportunity of Rs 10,000-13,000 crore, the report says. The used-car volume in India is only 70-90 per cent of new car sales, unlike in some mature markets where second-hand car numbers are almost twice or thrice the sales of new cars. So used car business holds huge potential.