re pricing question

To all the regular analytical contributors to this thread....thanks! You regularly entertain and educate with your insights and research.

A question for you guys is where do you find reasonably accurate market prices for all these "lesser" commodities. There are no LME or Nymex market places for rare earths, mineral sands, etc. Online you can find all sorts of info, but I can't tell how reliable it is. Many of you guys seem to be slightly closer to the coal face of the mining game than a punter like me.

Kalmsg's great little spreadsheet lists the pricing for ARU's Nolans products. Where did you get those prices, Kalmsg?

I just want to be able to do a little of my own due dilligence.

Any help is greatly appreciated.

Thanks again.