Exactly my point. One can agree or disagree with Faessel and his investment recommendations, but his experience is easily verifiable. You can do the same for others in the field - Jim Kennedy, Tim Worstall, John Kaiser - but you can’t find anything else on Matheson or OnG.
Thanks for sharing Walter. The Federal Governments science agency, USGS, publishes pricing annually for scandium. The pricing enclosed is per gram. With 1000 grams per kilogram, Matheson's estimates seem low.