Everything is server dependent.
You need to buy when everyone is selling. You need to sell when everyone is buying.
If it were that simple everyone would be rich and there would be no need for this froum, right?
Also theres more to it than that. For example.
Two weeks ago the price of whiptail fell to 39g a stack and elementium ore 29g a stack. Which is the lowest I have ever seen them. For months the normal price of whiptail / ele or was 60ish / 45ish a stack.
So based on everything I read it was worth buying to resell right?
So thats what i did. I bought 25k worth of the mats thinking I would resell soon and almost double my money.
So guess what? the price seems to have dropped for good. For the past 2 weeks whiptail has been 30 a stack and ele ore is down to 20 a stack. And I have been seeing people selling in bulk in trade for even less than that.
So it seems I lost a great deal of money. But back to my point, its not as easy as you make it sound. At this point I may just re-list everything and deal with my losses.