It's supposed to be like Grand Market, but the opposite. Grand market is hard to get your first few turns, but becomes easier once you have one. This is supposed to be easy to get at first, but become very difficult to obtain, since you'll have Scientists in play all of the time and you can't buy new ones. The "decision" comes from whether you want to pass on playing a copy of the card so that you can buy another one. Though, I understand that that's not the greatest or toughest decision.