Who would be a great shop to use to get OW certified? What sort of diving equipment selection can be found on CC. What kind of price should I plan on having to pay??

Check out www.belizedivingservice.com/ they are a great company to deal with. Safe and reliable.

There are 4 shops on the Caye. 3 Can certify divers. Belize Diving Services, as mentioned above, Frenchie's Diving Services and Big Fish. Why not check them all and see who gives you what you want and the vibe you would enjoy for 3-4 days while being certified.

Happy diving!