Exchanges such as Cryptsy and Btc-e allow you to set any price you want, but it's unlikely that you'll sell for much higher than the market rate.
Ok, thanks, I never saw those options listed on the site, but I guess you have to have an account first to see the rest.
You don't have to have an account; just go to the site and the first thing you see is a big buy list and sell list. Who do you think are setting those figures? It sure as hell ain't the BTC-e staff.