There seems to be a fairly simple and straightforward pricing model. All items have two prices - one low and one high, with a difference of about 2% for equipment and 10-15% for commodities, while equipment tax is about 2.5% and commodity tax is less than 1% (with high political rating, that is, otherwise it is slightly more). A station that produces something uses the lower price, while a station that uses a commodity in a production recipe uses the higher price. Equipment have the higher price where it is not produced. But there are some annoying exceptions to this rule, where something is produced to the higher price or used with the lower price. For example, Titanium is used for production at the Great Pillars-station, but it uses the lower price there, which means it is profitable to ship it out. And the Outpost station produces Explosives at the higher price, which means it is profitable to produce Explosives at the GP station and ship it to Outpost, but not from Outpost to anywhere else. Is there some place to report or at least discuss such details? I want the economy to be straight forward and encourage pilots to do roughly the right thing, these details just make it unnecessarily complicated in my opinion.