Many sell domains at the Godaddy auction, which I assume is easier to setup if it's already registered with them. Unless it is a premium high value name (and not just in your mind) you may well just get the $10 annual cost of a typical domain, there are plenty, even perceived higher value aged domains selling there for $5-$8. It might be easiest to just forget it, or put up a 10-15 article blog and hope it earns the domain cost in Ad revenue.
Small time operators who don't main an inventory of thousands of domains often do better by flipping sites, some starting from scratch, build up the traffic and search ranking of a site over the course of several months and sell it all for a decent profit. (Buyer beware, some fake the performance figures)
To put things in perspective, the majority of sites may be on shared hosting accounts costing $96 a year, which allow an unlimited number of additional domains to be added at a cost of close to $10 a year.