It's Craigslist - the seller may not know the difference in 18 and 19. Your picture isn't showing, but can you see the size of the tire mounted?
It's either a 19" or a rep. I'm gonna guess.
I am 95% sure OEM 19 doesn't have the holes in channel between each bolt hole like the one you have linked in ad does.
Objects in mirror are slower than they appear.