I'm one of those strange people who decided to learn aetheric cipher (for 150% ambrosia) instead of reselling it. I don't sell ambrosias constantly - only when happen to be able to buy cheap dust, so 4-8 potions at a time. Like this week.
So , here's the mail I received at friday, when prices were around 370-400k for dust and 100-130k for 1 ambrosia, they were set at this level after the patch. "Seeking for stacks and stacks of ambrosia for our trial raids, ready to buy hundreds, 120k/unit, COD, we have lots of money, we wait impatiently, etc." (You can read the whole text below, if I'll be successful in uploading the image that is) At that moment it was a good offer. It wasn't from any of my guildmates, and I know for sure that another player completely from another guild received the same mail, and another one at Saturday (with a little higher price this time, 150k/unit). I suspect A LOT more sellers received this mail too.
Saturday, at very early morning, in just a few hours prices skyrocketed from previous to 220+k for ambrosia and 800-900k for dust. Prices are still rising. (Reminder - that another player didn't react to the first mail and they urged him to sell for some bigger price - but not as much as it was already selling everywhere).
Do you see what they did there?))
(Yes, being naive and in a hurry, I didn't suspect anything and sent them little few ambrosias too via COD. They didn't claim them yet, probably letting them to chill in a nice 30-days cooldown. They took ambrosias from that other person, though)