This trend started as a fail over plan for webmasters, If all else fails they can always sell their projects for quick money and soon it became a profession. Making all sizes of sites just to get it up to a level where it can sell for a good amount of money.

Almost every webmaster thinks of selling the site the moment the idea for the site pops in his head. All sites sell for 10 times their monthly income which is pretty fair because these are sites established solely for the purpose of selling off to the highest bidder.

It is infact a great way to make money.Just a few popular revenue generating methods for flipping sites are:

1. Link Sales
2. Adsense
3. CPM Networks
4. Affiliate networks

The list is so small because those are the quickest ways to have some recorded revenue to sell the site at a high price (10x monthly income). One thing you should remember before going about flipping site is that you need to build authority and value while getting the revenue. I know if i was going to buy a site that is generating passive revenue I  would definitely want some proof that the site is going to go strong in the long run.