I actually was in Vegas many years ago (1988) when they were giving these out at the Aladdin - I still have the set they gave me.

Part of a promotion - you know roll the dice to see what cheesy "prize" you win.

The scammer knows they aren't:
"ORIGINAL ALADDIN CASINO ANTIQUE DICE" because when I quizzed them and then told them and then shamed them it was obvious they knew.

On top of being liars and cheats, they add insult to injury by stating that:

SHIPPING & HANDLING FEES "CANNOT BE COMBINED".
$3.85 USPS

Man - this close to beating the $12.95 shipping for 3 Tangiers chips I posted a while back.

On a more positive note, it doesn't look like they are selling many.