Does that mean you'll buy from AH for cheap and then at higher price? because, I had a friend who did this trick in another game haha..It's much like how entrepreneurs start new business in real life..You buy goods for cheap and try to sell for higher price to gain profit which is:
Cost of raw material/inputs bought-COGS (cost of goods sold) but this is risky as you might not get a buyer if you aren't lucky enough or if your offer isn't tempting enough..There's also another way which is get much premium crystals through gold then wait for exchange to get higher and withdraw your premium crystals for higher value of gold and then wait again for exchange to get lower but this is also a risky strategy and I actually prefer the safe and stable tactics like farming amalgams.
if you buy things that you need anyway its a safe bet
like crystal chips for runes
buy 100 and sell them for 6 crystal each
lots of profit, and even profit for those who need only a few, so you make gold and help others saving it
amalgam quest is "broken" by the long cd for the spark-summoning-item... its like killing a mob, summoning the amalgam-ghost, then killing another mob and waiting 3 seconds >.<
honestly, F*** this, i have NO patience for something like this, better go battlegrounds for amalgam then and farming for gold