The first Leaf has potential, but the low battery health makes it risky. Proceed with caution if you decide to pursue it.
The second Leaf is a less exciting option but could be viable if the battery health is good and the price is lower.
Consider waiting for a Leaf with more battery health if...
The 2018 Leaf has lower mileage than the 2020 Leaf. However, the 2018 Leaf also has a lower battery health rating. This means that the battery in the 2018 Leaf is not holding a charge as well as the battery in the 2020 Leaf. This could be a problem if you plan on using the car for long...