Whilst the first point is obviously true in my case, it is also a fact that this is a game and my feeling therefore is that I do not need to maximise profit.
That said …
If anyone was looking for bulk minerals and/or small goods like ammo (“bulk” being relative for a solo operator) then I would be open to setting up supply contracts. Long term contracts ie guaranteed sales, would promote my cash flow. And I am much more interested in that than absolute profit.
In that context, there is also the possibility that any truly bulk producer might be playing the volume game; shifting multiple units at under “retail” but above cost, to preserve cash flow, dominate market, and make very large sums. Just at smaller profit margins. And then the market lemmings jump in because they think they have to compete on price and have no other business models.
The way for @Ash_Beldrulf to compete might be to do as suggested; buy low and sell high but in niche (remote) markets and hubs. Although that is low volume, and slow. Otherwise, stick to mining (Emolgranlan or wherever I saw you last?) and just don’t worry about it.