Great advice here! I might also add that you may want to look at what type detecing you might actually DO, as opposed to what you are dreaming about. Watching these salty surf dogs and their awesome finds can skew your outlook, to be sure!
In my case, I live 200 miles from the marine shore. It seemed silly to buy something that is really a salt machine, like a PI or an Excal, when I get to the marine beach only occasionally.
Yet within an hours drive are more fresh beaches than I can shake a stick at. I am not retired, so weekends are my prime hunting time and this also was a factor in my decision.
SO I got the Tiger Shark, used. I had it sent to Tesoro before I received it from the seller and they gave it a peak and tweak and a clean "Bill of Health."
True, it isnt the BEST salt water machine. But, in general the beaches here in S. Carolina arent bad with minerals and it does offer a marine compromise I can live with.
However, it is one of the BEST freshie instruments you can use. For me it was a wise choice, based mostly on the lesser of evils.