Check the serial tag above the rear door, make sure it is a TKG* part number. Otherwise, looks like a good deal unless there's something seriously wrong cosmetically, that isn't shown in the pictures.
Also, what's in the control panel? Hard to tell from the pics. Looks like a black ball top joystick. What buttons are in it? The good news is Mike's Arcade is now selling near perfect, if not perfect, Ninty reproduction buttons. I just got some for my blue DK, and find no difference in appearance, feel, performance, compared to the originals in my red cab.
Figuring a bit on the high side for these costs for reproductions, including shipping:
DK marquee - $25
CPO - $80
Bezel - $30
Buttons - $35
Side Art - $85
So, you're in for about another $250, for the above, "have to have it right now, and ordering it off of ebay and/or Mike's Arcade". Better deals might be able to be had with some patience, but probably not by much.
From what I'm seeing, looks like a decent deal.