I am not a huge fan of domain hacks, there are a bunch of good ones available still. I think they are creative. Unfortunatley there is little you can do to make it worth anything without highly publicizing the existence of such a domain. You wont get anonymous offers unless you have posted in a place like this thats for sure. You wont get traffic, so there is no real value there. You have to create value with a name like this. So my appraisal is registration fee, plus $50 at most. If you were able to find a psychologist whom is also a domainer, he may want it for his blog or practice. You get high marks for creativity.