The whole idea of making such forum post in Bitcointalk is hilarious. How many forum members are millionaires, who are willing to buy an online casino for 1.5 million dollars?

You have a point I'm not a millionaire, well not yet but he is posting here not only for forum members there are many readers that are not a member of this forum, they just want updates and loves to see discussion and maybe, just maybe one of the readers happens to be a millionaire and looking for a business to set up that is related to gambling
There is something about this offer which screams scam, but I don't know what is it. What's the point of selling a profitable business?
The seller wants to buy a house. OK, but the casino is profitable enough so that the seller could buy a big and expensive house.
411K USD EBITDA per year isn't that bad. Just run the casino at the same profit levels for 5 years and you will have 2 million dollars.
The sellers wants to build a family business. OK, but the seller could use the profits and invest in his new family business.
The seller doesn't want to run this business by himself. I get it, but can't he simply outsource the tasks and hire some people to run the business for him? 411K USD is a big enough profit, so that the business owner could afford a team of good programmers, marketers and customer support.
Well, he's not the only one who sells profitable business but I doubt if this really is profitable because based on the computation the ROI is not good, I guess casino operation is a stiff business and he cannot keep up with the competition, but of course he will not include this in his reason.