I would NEVER think of buying a used EV...
If a home report (ie your commissioned building survey of the property you purchase) turns up defects, these can be negotiated as a reduction against the amount paid.
I think governments should implement similar laws. A free (or at the manufacturers expense) appraisal WRT battery life, which reduces the sale price by the refurb cost or wear&tear on the batteries.
If the refurb/wear cost is more than the resale value (essential, the vehicle is "written off"), then the vehicle is taken for scrap value (as if it was ICE).
The car can then be properly recycled, refurbished, decommissioned, whatever.... and sold on
I would NEVER think of buying a used EV...
I hope he turns this into a project car.
Either go crazy and put an ICE into it (like Rich Rebuolds did with his Tesla), or maybe try to see if he could salvage the pack by replacing only some cells.
What I've love to see is him turning it into a plug in hybrid. Add some kind of small generator in back and then replace all the electronics. Maybe double the horsepower or something while he's at it.