Best site to auction 4 online social networks with over 350 total members.

I am looking at selling 4 niche social network sites

Tattoo niche social network : over 350k members

Biker niche social network : over 20k members

Pet niche social network : site ready and fully operational but low member count

Street Racing soial network : site ready and fully operational but low member count.

Is there a good site to auction these to potential serious buyers?

 

try flippa.com

 

Thanks mezner

 

I second that, I have used Flippa to sell a few sites already and had great success.