I posted a trade for 1000 triantanuim for the default price listed at 2311531 gold coins. the trade authority rejected it saying I was price gouging, and that it would not accept any trades above 1400000 gold coins. My colony (and many others) could get banned due to this, and I would have to restart my colony from the beginning.
Same thing happened to me. Then it took my Triantanium and didn't post a trade at all. Oh well, it won't take too long to build up that much again.