This isn't really light backpacking gear, but some may want it for family camping. I have a like-new Slumberjack Trail Tent 6 (6 person tent) - It's less than 6 months old.

http://www.slumberjack.com/p-584-trail-tent-6.aspx

Retails new for about $180-$200,

I'm selling it for $100 shipped.