TopBonusCasinos.com and WorldPoker.us could be sold, but don’t expect to get more than $100 for either of them.
If I were you, I would develop the names, and then sell them.
What’s in a name (specifically, a domain name?)? Only what a webmaster does to promote it.
Some of the most off beat names have a powerful presence on the web… who would have guessed that http://www.drudgereport.com, http://www.google.com, or http://www.amazon.com would ever garner the attention they do today?
It’s all because they offer good product and promote like crazy.