Uncle Monster wrote:

-snip-
I'd like to know what detector costs $20.00,
what brand is it?

This one works for me-
Neiko- "Digital 3-in-1 Metal, Voltage and Stud Detector -
Auto-Calibrating"
http://www.jackstoolshed.zoovy.com/p...&utm_campaign=
I paid $20 +shipping - they are $7 now.

I got one for hobby metal detecting- and it worked so well I bought a
couple more as backups.

Jim