The GTA 350 I recently got on Ebay works fine. Now I only dry land hunt now, but I owned one back in HI as well in 1994-1996, I used that GTA 350 alot at the beach, and it worked well there as well. The GTA 350 was originally a $350 detector, with a free pair of Garret $44.95 headphones with it. I have detected coins down 5-6 inches easily.
It chirps quite alot, which I hate but, you will learn when to dig & not to dig, comes with experience. I paid $157.00 for my latest GTA 350.
I will be purchasing the new GTI2500 soon, and will keep my GTA350 as a backup/loaner detector. If you get a working GTA350 for around $150 or less, I would say it is better than
a cheapo version Bounty Hunter or Discover model, at least it is a more capable detector.