Been selling hq adamantite ingots at 300-500k for a while now, and they sell all the time, and I still make profit. Meanwhile the other 4 2-star mats are going for 800k-1m each, and people still buy. If I can make them at my low price (all the while buying purified coke from other people), then so can the other people with the other 4 mats. Razor thin profit margin my ass.