10-30mm and 30-110mm zooms rattle

I was just leaving feedback for cameta auctions on a refurbished lens. I remember seeing a couple of dings on the silver where the finish came off, but otherwise good... not serious enough to return. But, I figured I should check it out completely and as I was checking for dust or any lens defects and moving it I noticed a rattling noise. I checked the 10-30mm on the V1 and it made the same noise when moved. I assume this is normal, because both lens are performing perfectly and I am not saying this is a problem with the lens, I just find it unusual.

Does your zoom make a rattling noise when gently moved in a 180 deg motion, pointing each end of the lens down in turn.