Sedo, Flippa, etc. Just a few of the hundreds (thousands?) of providers that will help you sell your domain. But no matter who you use, you'll need to determine what makes your domain special - traffic, links to it, etc. That's what prospective buyers will want to know.
Sedo is the best one. I can buy it for the listed price, no questions asked. I don't have to inject myself into a possibly frustrating negotiation, and I don't have to hope that the buyer honors the price he is asking. If I click the buy now button, the seller and I are locked into a contract, and I can take him to court if he backs out.
I know that Sedo offers parking pages in over 20 languages. By utilizing geo-targeting, visitors to your domain will see advertisements targeted for their location and delivered in their local language.
The prices people are willing to pay on GoDaddy tend to be much lower than on other domain sales sites. I'm not a GD Auctions fan.
Bodis and Sedo are what I usually use. Bodis has actually been working better (more sales) than Sedo for me recently. The forum sites NamePros and DNForum are good for lower quality names. Bido is good for quick auction sales but sales prices are low.
Sedo.com would be the number one spot to try and sell your domain. You may also be able to post a thread here on WHT offering your domain and someone may come across it and offer you a price or take it for your asking price.