"I've bought stuff I've never even used once."

Same here. I frequently buy stuff for projects that never see the light of day. The idea looks good as a sketch on paper or in my 'minds eye', but part of it doesn't work in Poser. So the purchase doesn't get used, it gets backed up for a 'rainy day'.

Some stuff gets used once for something then never used again.

Pinky - you left the lens cap of your mind on again.