First of I must confess that I am a gear sleeze. Now that is out of the way I currently have the following that have never been used:
Golite Shangrila 3 (I carried it twice but just cowboy camped)
FF Hyperion in Epic (Gift and I already have one)
Golite Poncho Tarp (bought on a whim)
Wild Things Epic hooded windshirt (2 of them....can't pass up a good deal!)
Sierra Designs Gnar Down Hoody (just seem to prefer my down vest)
Black Diamond First Light (another gift and I haven't worn out the first one)
Katabatic Palisade (bought last fall but will get it out once the weather warms)
Ribs Pack (what was I thinking....I already had one)
The list of new gear, never used and sold, would be at least ten times as long. Sometimes it's because of a good deal, or didn't fit, or once I was able to handle it and inspect it, it just didn't measure up somehow.
I tend to buy gear in cycles and then sell when something newer, lighter, or improved comes out. I know I am sick Sick SICK.