Switching to Linux doesn't mean that you need to abandon all your peripherals. Most printers, scanners, digital cameras, modems, routers, video cameras, external hard drives, flash drives, audio interfaces, MP3 players, and other digital devices will work with Linux, Mac, and Windows even when they don't advertise it on the box or in the user manual.
Often your devices will just work; plug it in and start using it. Sometimes you'll need to install a driver, or just know what program to use to control the device. If you can't get a device to work on your Linux computer, don't just settle for it; email the company and politely request and encourage Linux support!