Destructive Rage - Master I for 70g..should I buy?

[DrSues0]

I have a chance to purchase the master I spell Desctructive Rage. It is our lvl 47 HP + attack speed buff that forces a berserk when it runs off.I am currently lvl 42 so will not be able to buy the spell for a couple of levels, and this is the very first berserker master spell I have seen for sale.From some high lvl berserkers, would you recommend buying the spell? Is this upgrade worth it?I would love to hear some feedback.

[Styk]

70g for Destructive Rage Master 1 = an awesome buy, you better get it.... on AB ive seen it for 3-5p

[Ziz]

<DIV>YES! good spell! GREAT price.</DIV>

[Fundi]

<DIV>        Any master spell that you can use at lvl 50 for 40g is a good buy.  Buy the spell.</DIV>