I'm selling 2 websites with online flash games.
• http://play-cooking-games.net/
• http://freegirlsgames.net/
Both were developed for monetization with Google Adsense, teasers and CPA ads, but after that were abandoned due to lack of time.
When buying sites, you will be gifted with 3 unique designs for other game websites .
How was the site performance? Honestly their are a lot of websites out there that caters into online gaming.