I based value in a situation like this solely on the amount of software being support. Criteria being both diverse and fully featured. Right now Sony really hasn't delivered on the promise of the Move, to be fair neither has Microsoft with Kinect or Nintendo with Wii.
It is only worth the money if you are ok with the efforts Sony is currently putting into it. I would treat it more like a toy and less like a gaming experience until someone comes along and proves that motion controls can replace or compliment traditional controllers in some sort of meaningful way.
For now it is definitely not worth it. That might change post E3, but most likely it will stay that way.