That's pretty much it, though Flippa is the best for selling them. As someone said, buy it here on DP and sell it on Flippa, you will most likely end up winning
Here is an article that details buying, selling and valueing a website. Determining the value of a website can be tricky, because a number of factors can play a role. Factors involved in determining the resale value of a website include... http://www.small-business-software.net/buy-sell-value-website.htm
I would also suggest flippa, because users have to verify that it's their website. Plus your bidding options are easy to set.
But before announcing the sell i would like to know some tool or site which would tell the price at which the site may be sold in the market and there would be buyers ready for it. I need it immediately. kindly help me.