Kuraine, I like many of your ideas but please dont kill the Lux Foods price on Stuttgart. It is one of the few places where we Synth Foods corporate lackeys (as Wesley Richter once called me ;) ) can pick up Lux foods and run up to Kusari, Sigma 19, or even Liberty and make a profit on it. We have few enough routes to RP that make any money, and that one is about the only reason youll see Synth Foods ships in Rheinland space.
Also with the lack of Lux foods coming from Bretonia due to the war, the price should be rising in Kusari systems.
Overall Id like to see food prices lowest where it is grown (with adjustments for local economy) and higher as you get further from the source.
Also, I think its a good idea for H-fuel to go up in price in Bretonia to reflect the lack of supply due to the war.
Then again Im more about RP reasons for carrying cargo. I may be one of the few who have actually carried a full load of 2000 Food Rations on my large transport just to stay in character. :)