I tried the Zircon MetalliScanner m40, which is sold as a stud finder
via Lowe's and Home Depot (mostly online; I haven't found it in
their retail stores). I think it was $29.95, but I might be a little off.
Anyway, it worked pretty well. It's reasonably sensitive and I was able
to find lots of targets when doing turf hunting. Considering the price
difference with a Garrett Pro-pointer, I thought I had a great bargain.
But it has a few problems. First, it's not long and straight like the PP.
The sensing portion is at an angle from the handle, so when you point
it at the surface, it works fine for pinpointing, but when you are working
several inches into a hole, it's sometimes hard to tell just where the
target is located. Several times I've gone the wrong direction from
the target and couldn't find it until I dug a LARGE hole.
Second, it's not nearly as durable as the PP. It's made of two plastic
halves that have a tendency to come apart if you scrape it on the
ground too hard. Also, the battery cover comes off too easily when
you bump it and/or toss it on the ground. (It works without the
battery cover, I've discovered, but doesn't protect the circuitry so
well without it, of course.) In fairness, it isn't designed to be a
metal detecting pinpointer. It's meant to be a stud finder, used
indoors to detect nails in the wall. And I think it works quite well
for that.
Finally, the problem that bothered me the most is that it isn't
waterproof or designed to work in damp grass. It gave me false
signals when I used it in moist grass (wet from dew or after rain).
Again, that's not a problem when you're looking for studs in
the wall, but it's a frequent problem when you're MD-ing.
So I asked for a Garrett Pro-pointer for my birthday when
my family didn't know what to give me. They gave me one.
It's great. it solves all the problems above. If I ever lose it,
I'll buy another one immediately, even though it's not cheap.
--Tom