MicrostockGroup

yeah, it is tough trying to capture something that is very small within a context.  I don't think this image really says 'hearing aid'  If it was put in a magazine or online you probably wouldn't notice the hearing aid unless you knew to look for it.  Perhaps a shot with a wide angle lens, with 1/3 of the frame filled with the hearing aid (along with the ear / head) and the other 2/3's of the image with someone talking to the person with the hearing aid.  You would only see the side / back of the head of the subject but it may convey the idea of a hearing aid better.

I think if you could get some good shots they could sell well as RF

to sell well on RM you need either tons of images or a very very good edited collection.

on Alamy now we have 18 million pics but 90% of them are junk.
no wonder we don't see any sales decrease despite this increase in the alamy collection.

most of the uploads are crap.
maybe with excellent quality, but still crap.

that's what happens with unedited collections.
great choice, as long as you've the time to sort the junk out.

your picture would end up in this ocean of "kid portrait" images :

http://www.alamy.com/search-results.asp?CreativeOn=1&adv=1&dtfr=&dtTo=&qt=kid+portrait&creative=&lic=6&lic=1&hc=&selectdate=1&txtdtfr=&txtdtto=&size=0xFF&ot=1&ot=2&ot=4&ot=8&imgt=1&imgt=2&archive=1&chckarchive=1

i don't think you'll ever make a sale with that unless you create something special.