I like healthcareassistant.net a lot because it sounds very good together. The words flow well but it is way too long! Although the .net is good, it could be better with a .com or maybe .org.
The other two are also alright but way too long again. I am sure Microguy will be on here shortly to share with you the wisdom on the 14 character rule. Or was it 12? :tu:
I am going to say that they are $xx as is.
I think the problem with both is they are hard to develop from a personal standpoint and anyone in those professions is more than likely to want their own name associated with their website. That said you may have some luck selling to an end user in the medical field. This could increase the price to a low $xxx IMO.
Have you thought about personal development of these? What are your goals?