I just used this detector last week and it was a blast to use on the saltwater beach. No falsing even in the harsh black sand. I wouldn't want to dig any deeper then what this machine was capable of. This machine is waterproof to 250' and is a pulse induction machine. $400 and I'll ship it within the 48. I will accept paypal. I don't go to the beach but a couple of times a year and I ended up tearing up my 67 chevelle today so I need to purchase some parts 