Mir isn’t living on the same planet as the rest of us, take a look at his other posts. Surprised he didn’t tell you to sell it for $1M.
The things a savvy webmaster would look for are PR, when the domain was purchased, in or out of the sandbox, what content was there. And, a savvy business person would look for a currently existing revenue stream. Seeing that you have someone interested in the domain for supposedly the branding potential, then there might be some intrinsic value. These things all come down to what someone is willing to pay vs. what you are willing to let it go for. winplayingpoker.com is a good name from the branding side, so a few hundred bucks could be reasonable. Also keep in mind that you are competing against godaddy where you can buy winatplayingpoker.com for $8.95.