Well doh!
Sure it would be a waste of money if you did that, and I don't even think that there are so many potions of invisibility, but as I said, there are spells etc.
The potion are only if you're in front of an enemy for example, then you aren't able to hide in shadows, so you drink the potion, you're invisble and can then backstab... A nice way to cheat death, too.
http://www.gamebanshee.com/ubb/wink.gif
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Bordin Steelaxe
The greatest Dwarf in history!... with an axe of steel
