simple strategy, Can I ask a question? how much can u get for each site? and how long did you care it?
true talk, just like my blog, i have daily average of 250 visits but the dont come back after each visit.
It's almost very good traffic to your blog, so make a blog may looks nice.. with good contents... & graphics
If the content is good and unique , but design is crappy, then this method could work! More niche website is the best for this method, targeting a older audience!
The Plenty of Fish website sucks and that guy has made millions. Find his article in Inc.magazine one of my favorites of all time.