In concept, I agree with everything you are saying - however:
The buyer is a teenager. There is no way in h*ll I would sell a non-feeding animal to a teenager. No knock on Tiffany, but even keepers with a lot more experience under their belts have issues getting non-feeding young balls to eat.
What good is a 48 hour warranty on an animal that can take months to starve itself to death? That animal was apparently a problem eater and they sold it on the cheap to a kid.
I'm loathe to sell animals to kids period. If one comes along that appears to have a pretty level head, I'll gladly make an exception on some species - but I would make damn sure that the snake had no known issues.
However, I would not sell an animal - especially a baby with known eating issues- to a minor. No way, no how.