This is something that was offered to me, not a project I'd planned myself. I've been offered a domain for $20, for a .org with keywords directly related to my main niche. The (exact) keywords that comprise the domain get an average of 9,900 searches a month according to the Google keyword tool, and have a CPC of 64c for the base term, going up to $1.31 for a variant. I highly doubt there's enough content on other sites to do an autoblog, but there are almost 400 related products on Amazon I could review and link to. There are no CPA offers or Clickbank products that would work for this niche, so it would basically be just the amazon links and adsense clicks on article & review pages.. With 9,990 searches a month for the main keywords, and a SEO'd site on an aged .org domain name, would you do it?