Auction

i worked for about 10 hours at an auction today, hard enough but not that bad, i was a runner of the carbons back to the register and i also clerked some anyway just thought i would mention that, also try to solve this riddle

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps? i will tell you at church after church i will post it