This looks like a very cheap scam attempt. I don't know how someone could pay over 1 million for a casino with around 1 year of alleged activity.
I've left him a neutral tag, because it's unclear whether he's simply a careless or clueless person, but in any case, by action or omission, he doesn't look like someone I would do business with.
I have also noticed that OP created his account back in 2021 and spent about a year without logging, only to wake up and offer this casino for over 1 million dollars.
(from August 2021 to November 2022).If I was OP, I would have not even considered to make such offer around here, there are better places to sell a webpage than this forum, where he has built no reputation yet...
Anyways, I hope some mod consider to lock this thread.