I bought a Littman Master Cardiology and LOVE it. I have had cheap stethoscopes, but this one sounds so crystal clear. I bought it off of ebay for $115, which was a steal. It came with the CD, extra ear pieces, name tag, and warranty. It was brand new. Make sure if you go this route that you only buy from someone who has lots of positive feedback. If you can get the Master Cardiology for the same price or less than the Cardiology III I would definitely go that route. Either one is a good choice, looks like you have already done some research. My husband said he would buy me an electronic Littman for graduation.