these definitely look real. the seam doesn't go through the hem like alot of fakes and the color is a bit dark but that could be the camera. best way to tell is look at the tags. sorry i couldn't be of more help!
I also believe these are authentic. The cut number shows they're a little older, and at that time no fake Sevens were being produced yet. All the fakes I've seen so far had a cut number starting with "7", so I'm quite sure older pairs aren't being imitated (yet).
Besides that, they look authentic because of the wash, too. Good luck on the auction!