Most domains don't sell for $99.95, you're going ot pay more than you are selling your domain in most cases. Just to tell you something, it's not the site parking provider that gives your domain price, it's the length of the URL, PageRank(PR2,PR3 etc..) and Alexa rank. Also if it's easier to remember then that adds to the price too. Just go with Sedo.com, you will get the same price fro your domain no matter what parking provider you use.
If you want to see a bit of how the site is set up then look at this image: