A power node runs for about 10,000 credits in Dead Space.
When one uses a power node to unlock a door one receives quite a bit of ammo and supplies inside. But it seems like it's not always a full 10,000 credits worth of goods. So I'm wondering if I'm better off saving my power nodes for later or if using them to unlock doors is always a net win in terms of credits.
Also, if anyone knows offhand, what is the average credit values of a power node cache?