I did a little research the last months with 2 domains, one insurance related and one about real-estate. I switched each between mini-site, Sedo and ND every 3 weeks. This is what I got:
insurance:
minisite $2.50
Sedo $0.30
ND $0.50
real-estate:
minisite $1
Sedo $0.13
ND $0.07
All PPC were for the same keyword and had about the same traffic. That means parked pages only make anywhere from 5% to 20% of what adsense pays.
So if I were to develop 10% of my names I would be earning the same, plus saving me 90% of renewal fees. After all the threads about parking here, I'm done with all these parking scams.
insurance:
minisite $2.50
Sedo $0.30
ND $0.50
real-estate:
minisite $1
Sedo $0.13
ND $0.07
All PPC were for the same keyword and had about the same traffic. That means parked pages only make anywhere from 5% to 20% of what adsense pays.
So if I were to develop 10% of my names I would be earning the same, plus saving me 90% of renewal fees. After all the threads about parking here, I'm done with all these parking scams.



