Photon46, "Get any richer than your average audiologist"?
I don't know too many wealthy audiologists (at least based on their incomes alone). My wife is an audiologist with a post graduate education of 3 year + 1 year internship + 2 years to get what is basically a PHD for/in audiology = 10 years of education. She graduated from one of the top 3 (I don't know where they are actually ranked presently) programs in the country, along with 12 others the same year. None of them could be considered rich, even at twice their annual income levels.
Audiologists are a female based profession, that being said the pay levels are far below equavalent male based medical professions (of similar life/death importance and educational training).
You are correct though in your interpretation of the legitamacy of the price of such a device. $5,000 is about in line with a good pair of upper range digital hearing aides. Most (not all) medical insurance does not cover hearing aides (although Medicare does?).