Well I must say White's Bullseye II pinpointer is the best I've seen or used. Me and my friend swear by it.
You can pick them up brand new for $79 on here, where they are usually $119
An old friend of mine has a Vibraprobe and it's crap because it cannot detect in red clay, so if your around red clay then I wouldn't recommend it, and also you have to turn it right side up for 3 seconds to turn it on, and you have 60 seconds to use it before it cuts off. You never know when its on and off in your bag so you can kill the batterys.
Which is another reason I love the Bullseye II is because it has 2 settings, and it won't turn on until you press the button, it has depth setting, and it can be used in all soils.
So take your pick, just don't be disappointed if you get the Vibra.