I'd def. be interested in the idea of selling side projects. I think Flippa is more and more become infested with fake SEO/web 1.0 marketing sites and its hard for a real site seller to sell.

I have acouple sideprojects that would put up for sale.

Both self-sustained, profitable. One is: Studygig, http://studygig.com

If you are interested, contact me.