Creating Wordpress sites to flip

tech & gadgets, since that's about the only sector in which America is leading. Pocket cams & tabletops by microsoft are big soon!!

There's two major directions I see in WP sites lately.

The first is the WP-as-a-website concept where people can make traditional websites and have them structured for content, rather than a blog.

The second is a magazine structure. Many media sites are moving to content published to the web. These sites contain multi-blurb structures with a large "featured" rotator at the top. These can go for big money. An example would be "headlines" from Woothemes.

Any number of the ever green niches are perfect since you are looking for sites that will not wane or go stale before selling them. These niches include weight loss (better beginning of year, around summer and holidays), credit and debt (especially in today's economy), parenting, relationships (get ex's back, repair marriage etc). Pretty much things that people want to know about year round. Most other ones don't have the sort of staying power and longevity it sounds like you are seeking.

This is basic SEO research you need to do before you start. The unasked part of your question is, "what do I care enough about to put the time in at all?" The only sites that will flip well sit at the intersection of your own skills and interests and "what's hot right now."

Finance, dating, adult are the main sellers as this is where the most affiliate revenue comes from. However as you probably know they are also very competitive.