You get to keep your snorkel. (Mine is in my closet)
If I remember correctly the snorkles were sealed in something (maybe a plastic bag?). And the snorkles definetely smelled new.
The masks you had to hand in after you were done, (but I did see a few people stealing them!)
The masks didn't look horribly used.
I guess if you have a question, feel free to call them about it.