The information OP provided here are the same information from the site you also provided that means the op is marketing the site for the broker.
And for the price or amount placed by the OP which $1.5m to sell the casino site is not too expenses because if the buyer is a genuine person and he handles the casino company very well with his customers, he can gain his money back within the 15 years stipulated time. But what I will consider is that after the purchase of the site, the new owner of the site will still spend enough to set up the site therefore, the seller should also consider those expenses and reduce the price.
I believe you mean "not too expensive"?
OK, but the question, how much capital would a person need to start a new online casino, and how much would be the difference from OP's $1,500,000 asking price for his casino? If it's still a "growing casino", I'm sure the new owner would be required to spend more for marketing to scale the business more, and the cryptocurrency online casino business is very competitive. Check how many Official Threads we have in the gambling subforum, all competing for our attention. It's hard to