I did my AOW with gear that I bought on eBay.
I splurged on mask,booties and snorkel and got them new.
The used items were regs....... around $35.00, BC was $20.ish, shorty was another $20. and the fins were $9.99 plus S&H....
I paid roughly $200.00 for everything.
You can dive on a shoestring budget if you have the time and know how to shop used stuff.
There's tons of information on the net to eval what's out there for sale.
As far as dive opportunities, that's where I prefer ton spend most of my money.
Roatan is waaaayyyy better than local quarries and the cost is much more reasonable than most dive trips.
Then again, you can do a western caribbean cruise and dive 4 or 5 great locations in one trip for cheap.
I think Carnival has 7 day cruise out of Tampa for around $600. and it stops in Cozumel,Belize, Grand Caymans and Roatan...and they stay in port all day so 2 dives at each spot would be easy. Heck, you might even get 3 or 4 dives if you wanted to.
That's some world class diving on a budget.
Just my 2 cents worth.