Before we start piling with answers please let us know a bit more.
Your knowledge of Sedo suggests you know about PPC companies. Am I wrong? What other PPC companies do you know of?
Regarding "how to make money" are you aware of AdSense?
Often, the best way to learn which PPC company offers the best ROI is to test your domains with them. There's really no way of knowing without a test. No one that I know of will guarantee you a higher ROI than another PPC firm - so test everything.
FYI - The Domain Forum isn't a place to attempt to sell your domains, so please keep your discussion general. Also, it's not a place for PPC companies to promote "why they're best/better".