There is a lot that goes into a price. PR6 alone is not the deciding factor, but definately good selling point.
You will have people on here who will low ball, and try and get people to sell for 3-6 months of revenue, and depending on the site, and other factors might be a deal if you are having a fire sale.
But a lot of people with a good product will not sell for so low unless they are getting out of the biz, and just do not care. A lot of it depends on so many factors from search engine, PR, backlinks, product, design, network, traffic, and so on. Noone can give a simple answer to this.
