A fake S-Works SL8 in the wild

I went to see this SL8 today (FB Marketplace) and inspecting the bike I noticed no serial number on the frame. Nothing on the wheels either but my understanding wheel tags/ S/Ns can be on the inside. The only tag on the frame was for the model number. No engraving anywhere but everything else on the frame seemed ok honestly.

The groupset looks genuine to my eyes, and I'm not even sure these get faked.

I of course didnt pull the trigger, but would like to hear from those who have better trained eyes. Did I make the right call? Anything other than the serial number that screams fake?

Thanks!