Someone explain this market mechanic to me, because i dont get it.
note the red arrow, the plus button is greyed out and i cant post a higher price, even if its below the current price 
You aren’t allowed to profit off of the market or buy things too cheap, just so you are more likely to spend real life money into the game
That’s it that is the purpose
Damn very low, I stopped selling (99%) my fuel.
Earn more if you put in the time to do raids. Very boring tho, and afk raid trolls.
Plus helps clan challenges, though my clans been lacking there for a month.