The problem with buffing contraband prices across the board is that people will just powertrade at 2 AM whilst 20k below plane, getting all of a contraband buff's bonuses without any drawbacks.
Satellites can work, but freighters are so small that the prices would have to be ridiculous in order to bring profit margins above what you could get by just rolling around in an ore-filled 5k. Raise them too high, and you have 5kers ferrying commodities while freighters unload it.