Unless you can find someone who wants to buy it, you cannot sell it.
Just wait for the period you purchased it for expires.
If you want to recover expenses you could try parking the domain - though its not certain you would be able to gain much from that...
Damn! So the next question has to be ANYONE WANNA BUY IT? LOL!
Its a great discussion.
But I'm afraid it would take too long time to get your domain sold. I guess forums will be the quicker if you wish to get rid of your domain for small money.
You gotta promote your domain for sale. There are a few ways I know. \
1. Propose to those web sites selling domain names (see a list of them in internic.net)
2. Propose to those who seems to be potential (for ex., contact to the companies who has the same biz)
3. Promote around the world in forums in popular web sites especially about IT, web design, web hosting definitely you can post to sell it here.
Hope it helps.