Looking again, it occurs to me that Carfax does not, AFAIK, usually mention replacement of the traction battery. (Confirmation or correction from other people is desired here.) It DOES mention replacement of the little 12 volt battery. If this is the original traction battery, then two possibilities exist: either the car was kept very cool and is a rare 2012 battery in good shape that would degrade rapidly in a hotter climate, or, possibly, the BMS was reset a few weeks ago to hide capacity loss. That might possibly explain the low Hx. Does the seller seem trustworthy? Replacement of a traction battery is a process that is much harder to forget than replacement of the 12 volt accessory battery. Look for positive confirmation in the receipts...
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.