Well, selling a domain isn't the hardest of things. Just post a generic message in a few forums (
TalkFreelance,
SitePoint,
NamePros, ect...) with a price and see if anyone takes it, if someone does, then just go back to your original posts and say the domain has been sold. If you're going down the auction road, then just get people to post their offers and keep them updated with the highest bid from the forums (which is harder than the first method).
Hope that helps.