A lot of people say that refurbished goods aren't for them. The reason for that is they have misconceptions on the quality, durability, and functionality of refurbished items. But the fact of the matter is this: just because it's been 'fixed up' or 'repaired' doesn't mean that it won't last long.
O-rings. They're those small, looped elastomers that mechanics and photography hobbyists always seem to say they need when they're in the middle of some project. I was pretty much blown away by how useful these little buggers were, which led me to think about what the world would be like without o-rings--and let me just say, it wasn't pretty.