I do think there are some interesting ideas in the direction of increasing prices, but it would need to be something more complicated than this. This is a stackable attack essentially, and in a four or five player game could lead to inescapable slogs where one struggles to even scrape together enough to buy a Copper each turn, let alone a VP yielding Estate. Even in a 2 player match up, a slim deck which places a few of these per turn -- perhaps with Throne Room or King's Court -- could completely pin your opponent.
As a technical note, since this card does nothing on your next turn, it would be cleaned up during the turn it's played, as per the rules for Duration cards, so the Duration type really isn't doing anything here.