I dive. If you plan on diving more than 8 days a year, buy your own gear.
Like the others have said you need to start planing trips. You should check out Cozumel, it's cheap and despite being beaten to hell from careless divers, it's still at the top of my list for value on a quick trip. I typically stay here www.scubaclubcozumel.com
It's a very no frills place, all meals included, and their dive operation is really good.