Here in a review they say around $20,000 for a new 2000 Insight. Then they say, "When asked if Honda would be selling the Insight at a loss, a company official rolled his eyes and said, "Yeah, that would be safe to assume.""
Honda Insight - Instrumented Test - Car Reviews - Car and Driver
Then in their long term update they say they drove it 40,000 miles and averaged 48 MPG. They admit they drove it like like they would any other car they test. Some of their drivers did better but still 48 MPG average over lots of miles.
2000 Honda Insight - Long-Term Road Test - Car Reviews - Car and Driver