It is not worth more than $6500 IMO.
I had a 2016 SV that I drove till 52,000 miles (lease was for 3 years 54,000 miles).....the battery had lost a bar, and gave around 80 miles of range in California weather realistically.
More than anything, it is the rapid advances in larger battery capacities that deflates the values on the older cars. In 2 years from now, sub-100 mile EVs will be practically worthless.
My 2018 Leaf with 150 mile range (40 Kwh battery) is at 28,000 miles now..and its battery seems to be holding up much better than the 2016 model. It is still giving almost the full 150 miles in California weather after 28K miles on it..
The 150 mile is already feeling a bit dated, with the introduction of the 62Kwh 226 mile range leaf...
2021 could most likely see a 300 mile range Nissan offering at the $40K price point...
1st Leaf : 2013 SV (2013-2016) acquired - Feb 2013 (Slate Grey)
2nd Leaf : 2016 SV (2016-?) acquired - Jan 2016 (Electric Blue)
3rd Leaf : 2015 SV (2016-2018) - acquired - Jun 2016 (Black)
4th Leaf : 2018 SV (2018-?) acquired - Jun 2018 (Scarlet Ember)