you can take a look to the auctions page. They are selling rollin.io at the moment which used to be reputable dice site

The link goes here
Rollin.io (BTC casino) is now for sale!This is the casino that came to my mind upon reading the need of OP.
But why you want to buy a casino if you can create your own. Plus the red trust on your account as "blackmailer" makes you untrustworthy.