as they known , north Africa been lived by many civilization (romans/Phoenician/ Berber … ets ), my question is ; as a start to seek treasure , which device will be convenient for me no matter how much it coast .
thank you guys in advance
Unless it's one big solid chunk, there isn't a detector made that will find something like individual coins, or, similar sized objects that deep. A larger solid metal object (something 15cm or bigger in diameter) a two box unit might work for you. GPR might work too depending on target composition, shape, and depth.