Best way is to attract as many possible buyers ->
Sell it at biggest marketplaces, pay few dozen bucks for extra promotion. Don't park it as You'll lose SE traffic, returning visitors, traffic trades, and sooner or later You'll lose PR.
Here is list of domain marketplaces. I would try all of them. Moniker got great Escrow, but Sedo and Afternic have more attention. Afternic costs 20$ one time fee to register but I think it's worth it if You want to sell at highest price.
ENJOY.
http://www.webmasterinter.net/2008/0...ce-comparison/