It would depend on the price for refurbing. If refurbing is cheaper, i'd go for it (not really sure what you're saying that needs refurbed).
I've got three of them. I've tried out the Cardiology III that belonged to someone else, and couldn't hear NEARLY as well as my Lightweight II SE or Master Classic II. Not to mention that thing weighed a ton around my neck, and the tubing was shorter, which put my face closer to the pt.'s body (which is ackward if the pt. had a well-endowed chest

).