He did offer to refund though, maybe not all bad, maybe a genuine mistake in regard to product availability. Although was looking forward to switch the keycaps with my two 11800s, no wonder I'm always a sad monkey.
Edit: Just checked, these black MX 11900 kbds have non standard Cherry key-caps, they are much more thicker/meatier, in comparison to my Beige MX 11900 and Compaq MX 11800. Maybe not so sad a Monkey afterall.