I'd keep looking, there are a lot of cheaper cars out there. I just got my first EV in October here in LA, a 2014 S for $7500 from a private party. 30K miles, had 12 bars, it just lost a bar a month after I bought it, DOH! Drives great, I love it, even though it's a SLOW charger, 3.6kW, no DCFC. That was the only black eye for this car, the private seller was asking $8000 but I offered $7500 since I figured I'd need to buy an L2 charger at home.
BTW from what I gather, the battery degradation (bars lost) is more related to battery age than mileage, assuming the car hasn't been abused in a hot area. I see some 2015s with 12 bars with over 50K miles.
I shopped on Carfax for a long time before I bought, Metro Nissan was flipping several 2015's coming off lease for $10K with 16K miles. That became my standard for pricing. At first I thought that buying from a Nissan dealer was more legit than a private party, but the salesmen really knew nothing about Leafs, or the many different warranties on the car/powertrain and battery.
I ultimately found my car on Craigslist, and I am the THIRD owner. No worries.
For a while now, Metro has had two 2015s for $14K, with just 323 and 1554 miles: https://www.metronissanmontclair.com/Ve ... f&offset=0
A Leaf NUT I met says that Silicon Valley has more Leafs for sale than anywhere, so you're closer than I was to Leaf heaven than I am. Keep looking!
Check for Norcal incentives at https://www.driveclean.ca.gov/pev/Incentives.php
. I'm getting $450 from my power company: https://www.scecleanfuel.com/
And $250 from AQMD for my L2 EVSE: http://www.aqmd.gov/home/programs/commu ... -incentive