Hey guys I have a Nice Tesoro Shark with a 10" coil, I purchased it last year brand new. I have (If I cant remember correctly) only used it 6 or so times due to the fact that I purchased a used Excal a week after getting the sand shark. I lubricate the O ring every 2 months so it is completely waterproof. 200 feet to be exact. Everything is in excellent condition. It is a Pulse induction Metal detector so it will operate in the harsh salt water climate with ease. I am open to all trades.. equal value. thanks for looking GL HH... I cant figure out how to get pictures on here so pm me and I'll send you some!