I've seen people run Dark Souls 2 in about 2 hours, probably more like 40-60 for a patient playthrough. Doesn't mean it's not worth $60. If a single run through the story is all you plan on doing with this game, then it's probably not worth the purchase right now. $30 sounds reasonable for 15ish hours beating it, playing side missions and exploring for secrets in my opinion.
I remember how much time I sank into the MGS2 tanker demo back in the day. Sure that was free but looking back, it would have easily been worth some money down. I'll be picking this up after inFamous to fill time till WatchDogs.







