Exactly. No reputable refiner (a real refiner that actually refines, not another middle man) will take less than 40,000 lbs.
There are many middle man that pose as refiners. It is simply not ecomomical to process, properly sample and refine small lots of a few thousand pounds.
There are very few true refiners for ewaste. If I had those kind of quantities, I would probably go to Xstrata or Umicore.
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