Poisson: I'm not claiming it's a good value-proposition for the buyer (and clearly it is not while E6 processing is still available for $10), only that the costs are quite reasonable for what goes into providing that service.

If you've ever had custom manufacturing and/or chemical-testing done, you will understand. Consider that a middling chemical engineer can pull $150/hour consulting, consider how long this process will take, plus the custom equipment required to run it, plus chemistry.