On second thought, the paragraph below is not entirely true, as seen in the bottom paragraph.
This card simply does not work in non-colony games. As shown by destierro, a savings rush on a province board with overcome most other strategies. Now, you could price it at seven or eight, but if your going to buy 4-5 savings at that price, you could probably buy 4-5 provinces instead without too much difficulty.
It has the same problem as the perennial worth 1 vp per copy of this card in your deck fan card.
Actually, thinking it over, $6 might be a workable price, but even then, engines will nearly always prefer savings to gold, and big money would probably find gold better in most circumstances. It wouldn't be all that exciting, but it could probably work. Actually, wait, engines might draw no treasure; that makes it more interesting. Definitely $6.