How people sell products are make their money has become quite different over the last few years. Generally people used to for example go to the large famous retailers who sell all kinds of equipment at standard high prices in shopping centres locally, or to local shops in towns around the country. But those who know better can go to the online websites and search for huge price savings in theory, because often the internet sites can offer the exact same products at a discount due to economies of scale and less overheads. There are of course disadvantages to buying online, such as internet stores and sellers such as ebay can be more risky than a physical store, you need experience to tell between the scams and the great deals. They can be found of course but check first using a reverse lookup or a background check service to make enquiries into the backgroud of the seller, and to check that they are not scamming you.