That works.My players often want to be space traders. They almost never want to do space trading. It is just their excuse to going places and having a ship. Hence my abstracted space trucking methodology mentioned above.
Do you agree with me that any ship's purser worth her salt would be keeping tabs on the various planets they tend to regularly, and they'd pick up on the best cargoes to sell to those worlds?
An example: an Industrial world, an Agricultural world, and a Garden world. The Ga has got a lot of stinky manure to sell, the In world readily turns it into fertiliser, and the Ag planet would bless the ground you walk on if you delivered that stuff to them.
This can be taken to a dedicated trade subgame thread.