So you have a domain name and you want a Quick Sale?. Well Auctions are the best place to look for.
Remember auction is mostly for quick sale and if you are willing to lower your prices to what would attract bidders. If you dont get any bids , chances are that you have quoted a high price, reduce the price appropriately.
♥ Once you have listed the domains in auctions you can market your auctions and send emails to potential buyers or post in Forums ( For sale / Auction boards ) etc. The more you market your auctions the better chances you have to get more bids and selling for a good price.
♥ If you have already got a bid the above tip will be very effective as it gives sense of urgency to other buyers.