
A dynamic (or even pseudo-dynamic) economy would be a great boon. Unfortunately I think that to institute even a basic functional economic system would require an enormous rewrite. However, I like your idea of prices dropping or going up in response to activities in nearby systems. If a Special Events OXP could be made which can cause an occasional dip or spike in the prices of certain commodities on certain worlds, then it might be possible to mirror that effect, slightly, in all the planets in the surrounding 7-light-year volume -- i.e. if there's a twenty-credit drop in the price of computers in system A, all systems within one jump experience a 5-credit drop (or some such similar formula). That should persist between restarts, given that it would be based on a stored variable in the OXP.
There are some other tweaks that could happen. Griff's made a beautiful model of a trading post; Commander McLane has made Anarchies.oxp which contains some code for a bit of basic bargaining... I'd really like to see these put together to create non-CoOp trading posts somewhere inside certain systems, a bit away from the planet maybe where you can actually haggle for stuff, perhaps with some adjustment being made to the possible final acceptance prices being based on the quantity of the commodity in the system (the total tonnage in both Trading Post and main station). So if there are a lot of computers in a certain system, regardless of its own economy, then the price in the Trading Post would go down. Players could actively alter this by shipping in a big load of stuff into a system and selling it at the main station, causing the offer price in the Trading Post to fall.
How doable any of this is, I don't know!