There is a definite advantage to buying scuba diving equipment. Regulators are a major investment for most scuba divers and usually unless you are diving over decades will be a one time purchase for most people that are sport divers those divers that go down the tech wreck and professional scuba Divers will of course Probably upgrade many times during their careers For most divers the order of what they will take on a dive trip will be mask and fins followed by computer and then regulators. The advantages of your own regs are many . For most people not having to share with others is the prime consideration as you are the only person sing them. also you know when and by whom your regs were last serviced by.
Regulators 1st stages
Most times when people are referring to their regs or their octos they mean the 1st stage, primary 2nd stage alternate 2nd stage and usually the gauge information package which usually has a SPG / air gauge and a depth gauge and the low pressure inflator hose and a 2nd inflator hose if you are diving with dry suits. So when you get ready to buy your regulators this is a little confusing some dive centers realizing this will sell you a package that includes everything together this is sometimes a good way to go as they will buy in bulk the pieces that will make a good set and you get the benefit of their knowledge of what does the job and get a good price as well. Many people like to buy individually which is a good way to go as well Maybe you don't want to buy all at the same time but buy it over time or maybe you want save even more money and buy some used components like the SPG or depth gauge or alt 2 nd stage.