Thanks to the Internet, you will be able to buy an oscilloscope from just about anywhere today. You can do your research on the devices and then find the ones that seem like they are going to be ideal for your needs. You will then be able to look at a host of different websites, even Amazon, which offers oscilloscope. Whenever you are shopping online, it is a good idea to compare prices to find the best deal. Do not forget to factor in the cost of shipping the device when you are choosing a place from which you can buy.
Of course, if you want to buy a scope in person, you have some options, as well. Some electronics stores, such as Radio Shack, will sometimes carry the scopes. However, since the scopes are not items that sell in large quantities they are not always going to have them in stock. Even if you are buying in person, you still want to make sure that you look up reviews to know that you are getting a quality piece of equipment.