This is an Apple wired USB keyboard, model A1048.  It has been used.  It's been tested and it works.  The keys and the board need to be cleaned up some, with little spots and discolorations on them from use.  The plastic on the bottom has some scuffs, scratches, and spots on it.  None of the flaws are all that major.  Just the kinds of things that lets you know it's been used, and you may be able to clean some of it up to get it looking nicer.  Thanks for looking!