I have 500+ names - vast majority at sedo...currently
So far I have tried:
Goldkey - hated them
Sedo - low pay, low conversion, low traffic
DomainSpa - too many "rejected" clicks from a long list of prohibited countries
NameDrive - pretty happy so far - right off the bat I received higher stats and clicks and click revenue...Nicer landing pages (though DomainSpa has the nicest imo, but the pop ups are spammy)...I am piloting their program with 50+ names (10% portfolio) to see how they perform.
I will say that my decision to move away from Sedo will be just as much based on their relationship with 1and1.com (<-- devil) as it will be with revenue...I just cannot do business with any form of 1and1.com...
Sedo and 1and1.com are the same