I am typing/mousing with it now on my Mac. It looks brand new - better than in the photos.
And I cannot stand the spacebar. It's just plain awful. I opened it up to see if there was something wrong with the stabilizer and there is not, but they used cherry "grey?" switches for the spacebar, and a couple others as well. Other than the 4x pressure required to space it, it's pretty nice to type on. The brown audible sound must be the keys bottoming out.
Inside it was clean as a whistle. Being I had to void compaq's warranty to open it (like they would honor warranty on this, lol), I don't think he opened and cleaned it. So it's just a pretty new board with nice keycaps.
NKRO does not exist here, and I cannot WASD in any game and use any other key; the movement keys stop registering until I lift and repeat.
He charged too much for shipping, though I am not sure I have regrets. Other than the spacebar it's pretty good to type on.