k man said:
Yes they are 100% worth it I bought a jack Lange f1a4 mod 2 and added a 14 inch nugget finder.these machines are the bomb

.so simple to use and handle and I can almost always run the gain on full tap.if you have the money and thinking about it jump at it you won't be disappointed. also the after purchase support has been awesome.hope this has helped. kim
Before I purchased, I had looked and looked at different info on "Gold" detectors, and was leaning towards a later SD series. From all reports the SD's are still considered very good, and the F1A4 was favourably comparable, and with Jack Lange commenting the level 2 modded F1A4 machine was up there with the GP 3500, I just couldn't resist given the price.
Obviously the more you pay, the closer you get to a situation where you should be buying a GP 3500 + and not the F1A4.
However the other consideration is the fact the F1A4 is often found in "new condition", been sitting in a box for the last 10 years in some army barracks and barely used and well looked after. Not to mention that almost everyone agrees its extremely stable with electrical interference, and user friendly.
I'm no expert, but i've done my research on these machines. A lot of people who are looking for Gold are conned into VLF's and for the most part are then disappointed when the machine screams at everything and you feel like hurtling it in the bush after a few minutes of use.
The stock F1A4 when I tested it at Coles Bridge, was superbly quiet, and I was able to pick up a sweet little signal that my mates AT pro couldn't hear above the chatter. Turned out to be a tiny piece of metal. Not saying his setttings were correct, but NO SETTINGS REQUIRED on the stock F1A4!
I always wanted a Pulse Induction machine , but cant yet justify the big spend on the Rolls Royce GPX model while I can only get out detecting a few times a year.
The F1A4 certainly fills a gap in the market for some of us blokes. All I would say is you need a bungee for sure as the machine is quite heavy without one.