I'll second Sushi's electronic stud finder value proposition (but I'll stay away from the other). I can't remember what I paid at rat shack for the stud finder (my wife keeps holding it up to my chest and asking why the light doesn't go on - beats me!), but since I have wood paneling (which is a heck of lot harder to patch than painted dry wall), and the number of times I've needed to screw things to the wall (more than speakers), the alternative would have been "swiss cheese modern".
Seriously, I've found this puppy to come in handy so many times it's funny. It paid for itself the first time I would have missed, just in hassle alone (I almost remember it was less than 10 bucks). It verified that the "knock" test is bogus in 90% of the cases.
Cheers,
Doug
