kreynolds said:
Take this, for example. You have this blindfold on, you're attacking me, and now its my turn. I make a x4 move outta there. I no longer exhist to you.
You can only move half speed in darkness (because you are effectively blind in darkness). Most creatures have a speed of 30 or less, which means that even running at x4 you are limited to a 60 ft move, which leaves you within the blindsight radius.
And you are assuming that you can move in a straight line at least 60' away. In general, most fight take place in enclosed spaces (generally called "dungeons"), and you will be limited to 30' of movement because you have to turn a corner or hit a wall at some point.
You are also assuming that your opponent has the option of just running away. Many times that is not the case in dungeon settings (guardian creatures, etc.).
Granted, you may be able to figure out if which direction I went with a Listen check, but what if I turn (there's a feat for that somewhere)?
Wouldn't even need a listen check. Even if you could somehow move more than 60 feet, I would know exactly the path you are following after you leave my darkvision range. The feat you mention would help, but I've yet to see anyone actually take it, so I really don't think it can be considered a common balancing factor to this magic item.
If there are two flights of stairs next to each other, one that goes up and one that goes down, I don't even need to turn. With me outside of your range of blindsight, you don't know which way I went. If I'm hasted, its even easier to get away from you.
Big IF there. The number of combats that take place 65' or more away from a stair landing (in a straight line no less) are so small as to be insignificant.
Normally, you could just open your eyes and see which way I went, but with this blindfold, you can't see.
I don't think evading someone with this blindfold would be very difficult (depending on the circumstances, of course), so the price doesn't seem that low to me.
Under a few very contrived circumstances (such as the ones you mentioned: have a specific feat or having a conveniently placed set of double stairs), it would be possible to escape fairly easily.
Under the circumstances that most fights take place in, it wouldn't be easy to escape (barring a magical escape such as teleport). That's what makes the price too low.
(Of course, the blindfold doesn't give you and advantage against a creature who also has blindsight, but even then it can put you on an even footing with the creature if it is invisible or within magical darkness, or concealing fog.)