best LRL and treasure hunter muchine?

[gabriel]

Hi
I am treasure hunter and i would like a unit that it detect ancient abjects(gold & silver objects, coins, cups,...) in 3-5m depth.pleas tell me that what can units find and detect these objects for me.
is multi sensor or pinpointer made by "accuratelocators.com" good for me?
who know pdf-1000 made by fitzgerald "treasurenow.com"? is it good lrl?
if no, pleas tell me the best lrl that you know, that it can detect above object at 1km distance and 3-5m depth?
my fields are mineral, sandy, rocky or Rough.
regards