I have tried SEDO, but I never have a single click though the stats say it has 600+ visits.

check to see what sort of traffic it is (park on your own server). If it's just image hits (someone trying to pull an image) you're not going to make any money anywhere. also figure out what country and how they are getting there, could help you target properly.

NameDrive.com (http://www.namedrive.com/)

ParkQuick.com (http://www.parkquick.com/)

Parkitnow.com (http://www.parkitnow.com/)

Dotzup.com (http://www.dotzup.com/)

Parked.com (http://www.parked.com/)