The only photo I looked at was the one showing 10 SOH bars the best I could make out, $9K or 10K I expect may buy it. I expect due to 60K miles it is on its second battery. A call the toll free national Nissan Leaf customer relations with the VIN and just ask if the BMS update has been applied to that car yet would be my ice breaking question. They can see its Nissan dealer service history with the VIN.
Short of Nissan going out of business short term I think they will honor the 8 yr/100K mile warranty. I think the 8 year part is a fed requirement. If one checked this car out in person and it looked and drove fine for say $10K and in a year or two lost 2 more bars you should be up for a 40 kWh lithium ion Leaf battery.
I did see one showing only 8 bars. Ours was showing 9 bars and lost the 4th six weeks after we got it. I wanted it because it looked like new and was an SL with all of the options sold by Nissan in 2016. The selling Nissan dealership had the 8 year warranty printed out when I arrived and clearly stated per his Leaf tech that some time in the near future I would be getting a free battery as one of his main selling points because I had raised a question about it only showing 9/12 SOH bars. At the time I did not know the BMS update had been ran already.
Some at Nissan may not be excited about 30 kWh Leafs being bought bought cheap an then getting a $12,500 plus installation retail new battery free. I would guess the battery cost is more like $150 per kWh or around $6K.
The more happy Leaf owners they can quickly gain over the 40 kWh offering the better it will help the sale of 2020+ Leafs I expect since few in the USA even seem to know Nissan makes and sells EV's period.
Consider paying some more for a 2016-2017 Leaf that SHIPPED with the 30 kWh battery. Only the last two months of the 2016 did the S trim start shipping with the 30 kWh battery. Now it is clear Nissan knew the BMS update was not going to fix the bad battery technology so they cut the market life of the 30 kWh line short like they did in 2011-2012 battery technology issue.