There is no way you will pull $200+ from this domain. With all honesty, the plural "Pokers" absolutely kills this domain. While I do like it and believe it has a catchy name, "GreatPokers" sounds more like something an illiterate and non-serious person would use as a website name. If the domain was GreatPoker.com, however, the situation would be entirely different. I would ask for $20-30 for this domain, as it simply has little appeal. With development and/or a turnkey website established along with the domain, take your monthly revenue and multiply it by 12 to get a starting asking price. If you don't sell it within a few days/weeks, lower the price gradually until it sells.