Or think of it this way, if you buy a new off the shelf body or lens maybe 1 in 1,000 has any type of QA check done to it. Refurb units have someone go through the entire unit and make sure it is functional and you still get the same full warranty. I've bought a body and two lenses and you'd never know they weren't fresh out of the box. Never had an issue with them. I'm not sure how much QA goes into Adorama's used gear (maybe if Helen Oster is around she can answer that).