With that said, I'm a big proponent of learning to auscultate BPs and lung sounds with a cheaper scope. Then when you move to a better one it's that much easier and you also aren't stuck up poo creek without a paddle when you don't have your super-dooper-stethoscope.
Just because you can hear better doesn't me you know what you are hearing. Learning on a cheap one then switching to a nice one makes a big difference. I know EMTs that went out spending $200+ before they even went to class. They can use their own but when forced to use another they can't get the easiest of bps
With that said, I'm a big proponent of learning to auscultate BPs and lung sounds with a cheaper scope. Then when you move to a better one it's that much easier and you also aren't stuck up poo creek without a paddle when you don't have your super-dooper-stethoscope.