Cool idea, but very flawed
First, just wanted to say you can beat the game in the first 2 minutes. all ya have to do is kill 5 pirates and get enough $ for the money lender to lend to you. Then you get him to lend you in increments of $2000. you can do it as many times as you want, as long as you dont go past 2000. from there, get about 200 000 dollars, buy the best ship/best guns, attack the guy, and you win.
That aside, the trading aspect was very unclear. If someone is slowing exports to someone else, there could be a variety of reasons for it, and a variety of results from it.
I mean, because someone is slowing exports to someone else, it could be because the importer has enough of the product (hence he doesnt want to buy anymore, which would mean hes willing to pay much less for the product) or it could mean the exporter had too little of the product to export (hence the importer is willing to pay more for the product since his regular exporter has less to sell).
For this reason, it was impossible to tell what you meant by someone slowing an export to someone else.
Cool idea, but the very base idea for the game is flawed itself.