Haha I just saw this. I was like Omen? Some rare Schecter? Then I realised very quickly the "Omen" was just a sticker like you said! It's very close to me so popped up in my marketplace. I do find the shape fascinating, how does it play, if you recall? With work, this could be a cool guitar to play on stage or YT videos.
As for how they got it, someone obviously dumpster dived you!