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The technique I used was to create hobby websites and submit them to DMOZ. When they were listed and gained their PR I would then place low key text link advertisments to my product pages. This allowed me to rank well in google as it gave me product pages with high PR, I have full control over anchor text and even flexability over the content on the linking page.
I want to sell these assets.
Where can I find a market to sell my high PR hobby sites for a good price?
There were quite a few link sellers but the prices seemed, rightly, very low. When you buy a link for a year nothing stops the vendor selling many more links on the same page or diverting PR away from that page. That cant happen when you buy the whole site.
I'd seriously consider going into the business of creating and selling websites with real content and legitimate listings in DMOZ if I could get a reasonable price for them.