Checkered Jester, with all respect, I think all the players who have commented on similar problems before disagree. Given the poor markets, it just doesn't work that way - especially if the doubled resource is a common one anyway, that no-one really wants because they already have it. It doesn't make you more able to trade, it makes you less able, because you have less of a variety of goods to trade and thus are less likely to be able to fulfill the needs of the players whose goods you need.