Sorry to have been misunderstood; I should have elaborated as I only dealt with one aspect of your post. Mea Culpa.
The domain in question was regsitered with Network Solutions and was sold through Godaddy. The sale was a complete fluke; Manna From Heaven, found money on a sidewalk, which goes to show you just how flaky the internet can be! Probably never happen to me again but one never knows!
I buy domains by the hundreds, put some sort of content on them, show them unrelated landing on landing pages, promote the landing pages and when the time is right, list the individual domains with Sedo and do quite well, thank you.
Now you can also simply promote your domain with a header that says "This Domain For Sale" but that is an awful way to go as most surfers interpret such a notice as "This Domain Is Not Worth The Bandwidth It Takes To Show It!", so I don't recommend that method.
Forgot to mention that I always have some sort of CPA, PPC or other affiliate program on the domains while they are "parked" on my landing pages so they can earn while fermenting.
I buy a lot of dot coms and tons of dot infos. Dot info domains are highly under-rated and inexpensive as you can catch them on sale now and again. If you buy a dot info for $1.99, host it on an unlimited server for a few months, earn a few $ from the content and then sell it for $35 USD, you have not made a lot but if you are doing hundreds 24/7, you can do well.
Thanks for looking!