Good choice! As you can see from my avatar I had a (much loved) Spark EV.
A few things when buying one used:
1) Get one with CCS DC fast charging.
2) If it has DCFC, get one with the lowest mileage you can find. A high mileage car with DCFC probably means they fast charged a lot. So more strain was put on the pack.
3) Supposedly the 2015 and 2016 have better and more resilient battery tech than the initial packs. The newer packs were built by LG Chem. Their packs have been very reliable in other plug-ins.
4) Try to buy a Spark from a seller in a mild climate like California.
5) In Dallas we usually have at least a few weeks of 30 and 20 degree weather. It was 18 here today for instance! I usually got about 75 miles in the winter. 85 ish in the summer and 90+ in spring and fall. I would pre-condition the car before driving and turn on the seat warmers. Then once I was driving, I would turn on the defroster only and set the temp to “low” (that is about 60*.) It was enough to keep me warm at least.
The battery in a Spark will far outlast a leaf. I had mine for ~ 13,000 miles. I caught up with the new owners of my car at NDEW and after putting on several thousand more miles into the 2014, they were still getting 90+ miles per charge in the fall.
Under 20,000 miles you should see very little to no degredation. But a Spark pack will not last nearly as long as a Bolt or Tesla simply because of the small pack size. It also does not have the large “buffer” of a Volt. To be safe, prepare for 5-10% range loss at around 50k miles. But there aren’t enough cars out there at higher mileages to give you exact degredation.
To increase the pack life, keep it stored in a garage away from extreme heat. I suggest trickle charging on a standard outlet if possible and only using DCFC on long trips.
If you get a car with under 20,000 miles and you drive less than 10,000 miles a year... it will be a totally awesome car for years to come. Especially if your round trip commute is 50 miles or less.
I had 2 years of Spark EV ownership. It spurred our households love for EVs and we now have a Volt and Bolt.
The Spark is a blast to drive. Turn on Sport mode and keep both hands on the wheel!!!