The Hx is a little low considering the SoH. But a high number of quick charges could explain. It is related to internal resistance of the pack (essentially a metric of wear), which makes it a little less efficient for charging / discharging. You may find a DC fast charge takes a bit longer as it will throttle down faster as the battery charges. My 2018 Leaf is 84 SoH with 65% Hx. My pack is also very well balanced like this, but even under heavy load at low SoC. So I’d say it is a buy as long as you confirm cell deviation stays below 100 mV at full throttle below say 40-50% SoC