Haha, I was just typing up what Yokmen said and pressed post, only to see that "a new reply has been posted" and it just so happened to be what I was going to say! Great minds think alike? :
Before reading the following, take into account that I am vehemently against putting prices on legendary items since they are so prone variation. I don't think that your equation directly translates into value. Effectiveness on a scale of 1-2 over how many players own? The prices of things would have went haywire during that week all of the Pike of Kings dropped! Even so, I doubt that the Hurricane will ever be 7 times more expensive than the Fiendish, nor that the Dreaded War Pick will ever sell for 6 times more than the Dragon Axe. Trade just don't work that way, they are much more complex and are very much based on human characteristics (obviously very illogical). This concept could be very useful for many things, but pricing legendary drops is not, in my opinion, one of them.
And valuating is not a word, try "valuing"
Before reading the following, take into account that I am vehemently against putting prices on legendary items since they are so prone variation. I don't think that your equation directly translates into value. Effectiveness on a scale of 1-2 over how many players own? The prices of things would have went haywire during that week all of the Pike of Kings dropped! Even so, I doubt that the Hurricane will ever be 7 times more expensive than the Fiendish, nor that the Dreaded War Pick will ever sell for 6 times more than the Dragon Axe. Trade just don't work that way, they are much more complex and are very much based on human characteristics (obviously very illogical). This concept could be very useful for many things, but pricing legendary drops is not, in my opinion, one of them.
And valuating is not a word, try "valuing"