Eric has been a member here for nearly 6 years. In that time i've found him to be an honest, knowledgable person.
If you re-read the for sale ad, you'll see the first thing he says about them is that they are OEM. From the pictures they do look OEM to me. Also, as far as i know, there aren't any 17X 8.5 contour replica's (all the reps are 7.5)
This is an absolute steal, if i didn't have 6 other sets of wheels kicking around my house right now these would be mine. (Eric, if you need wheels for a different car or any other trade LMK)