However if it is not hosting related, I recommend namepros.com or dnforum.com for a better sale, since they are specifically dealing with domains.
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I wouldn't recommend dnforum. They charge you to be a member. Plus they have a three tiered price structure. If you register with them and do not pay to join their forum, they offer no means of opting out from their mailing list. From my experience dnforum = spammers. You might be best to check out the domain name section on this forum and ask the question again.