If the game was still going, instead of calling this “bidding“, you could call it “bribes to get someone with direct contact with the designers to push to add specific abilities“. 😛
Spain gets a capture crew at Bonny Peel’s price, and a sac-captain equivalent to the original Blackheart.
I think an equally interesting thought, especially if it could be applied retroactively, would be to bid to remove certain items and/or prevent certain nations from ever getting them. Not every nation really needs or should even have a canceller or sac-crew.