yes, totally worth it
but only if you are focused. What i mean is, if you really need tons of materials, or rare weapons, magic find will help you.
you start to notice the effect of magic find when you get 25% or above.
for example, when i got to Gendarran fields for the first time, and i killed fireflies y barely got 2 or 3 small venom sacks, but today, trying to get my daily 50 kills, i got around 20, and a rare dye, and i had 56% of magic find at the moment, if you get a full set of magic find you can achieve around 85% of it.
so in my opinion is worth it, but you should try it anyway to see if it fits you
sorry for the long post and for the weird grammar or typos, english is not my main language XD