I found this for .sr: "Your company must be registered with the country's authority, and in most cases the domain name must resemble the company name." I'm guessing this is now no longer true?
Anyhow, at least at register.sr, I saw $300/yr fee, and since they had Casino.sr listed among their registered names, I have a feeling that's where you got the names. That's not too bad.
I don't think the extension measures up to .bs or .pr because I don't think poker or casino playing is known to be as popular in Suriname as in the Bahamas and Puerto Rico. Also, I don't particclarly think an end user would have success marketing it as a "casino for seniors" or "poker for seniors". The fact of it being on the internet pretty much messes that notion up.
So my personal opinion is that you're looking at about $2k for Poker and about $5k for Casino. Poker sells quicker lately, but Casino is still worth more.