A 2016 model year car, at the end of 2017, is not “new”. Also, I don’t know what specific electric utility subsidy you’re referring to, but that doesn’t help your argument, in this thread about subsidies, IMO.
What was the out-the-door price for your parent’s 2017 Leaf?
And, did they buy a new one? MSRP is $30,680: https://www.nissanusa.com/electric-cars/leaf/versions-specs/...