Shop for low-cost oscilloscopes on specialty scientific equipment websites such as Batronix.com, on hobby websites such as PDAMusician.com, and through general retailers such as Amazon.com. Low-cost oscilloscopes come in many different configurations that affect the price, including free-standing units, USB devices that plug into a PC, and do-it-yourself kits.
To save money on an oscilloscope, first decide on the features you desire, and search for a unit that meets your minimum requirements. The lowest cost option is typically buying a digital oscilloscope kit and building it yourself from scratch. The next step up in price is a USB device that uses a PC for processing and displaying data. The most expensive category is a free-standing, two-channel digital oscilloscope.