There is a definite advantage to buying scuba diving equipment for your own personal use. Obviously you know the condition as well as how often the gear has been serviced, and who your scuba diving gear was serviced by. You also have a benifit in that most scuba dving centers and clubs and dive liveaboards will either give you a discount for your own dive gear or they will not charge you extra to rent their dive gear. if you do a lot of diving this will really work to your advantage and maybe you are one of the lucky ones that has some good shore diving near by like most of the people in Hawaii Florida.
Most people start off buying a mask and snorkel then either a wet suit or fins. After this they will ussualy buy their regulators or perhaps a computer. Then again if you have the finnicial wearwithall you might consider buying a complete dive kit. SSI Divecenters and stores will promote dive packages that will suit a divers skills and future diving based on a throught knowledge of you from your association with the dive centerThis can be a great way to go as they will put together Dive sets with proven gear and as they purchase them in bulk you get a better price than if you bought the dive gear ala carte
Masks come in many styles and coliors and what is important is that the mask fits you correctly there is nothing more anoying on a dive trip than to have a mask that is leaking for the whole dive. something you must ask is if the skirt of the mask is silicone perferably surgical grade silicone?
Snorkels another consideration is the snorkel which despite what some will tell you is a very important piece of safety equipment
regularors and guages
Fins like all scuba diving equipment come in many shapes styles and prices you need to work with a dive pro to really get a good idea of what type of fin to purchase. The things to consider here are are you going to be doing alot of boat or current dives
Wetsuits will depend on where you are going to dive remember that it is better to be warm than cold espically when you consider the effects of shunting and decompression sickness (DCS)
Don't forget the Scuba Diving Travel Insurance Scuba Diving Adventures Lost at Sea