You do not need the greatest and latest, tho it helps if you really know how to use them.
I have an old Garrett Groundhog made in the late 70's. It won't pick up smallish stuff. Last nugget it picked up was just under 3 ounces.
My FIL has a MineLab, cost him over $6000 but paid for his house and brand new Isuzu DMax with all the goodies last year.
But he has a wealth of knowledge and spends a lot of time, 70% research and 30% detecting.
The floods 2 years ago were a boon to the goldfields, exposed some much, like all the ground was virgin again.
It is a nice way to spend some time at camp, and you never know what is under the next piece of ground.
Don't ask, he won't even tell me where he finds it