This is moot point for the time being. Is there a rule that team like let's say the pirates offering huge posting fee to guy for the express reason of trading him off for prospects? Let's say the yanks don't want to pay Darvish (or hypothetical japanese player) 60+ mill Let's say the afforementioned pirates win the posting then trade (Darvish/HJP) to the yanks for Montero, Banuelos and Williams. Would that be legal?