You can make around 1,000$ in the first month according to the statistics provided. However Revenue depends on your site category. Secondly, traffic will decrease rapidly when the site is parked. I have realized even 1,4EUR for a click on Sedo but it was an isolated event :-(
if you have no traffic, then yes. @vitalous: sedo seems to count a lot more traffic than any other parking company, you are right.
go with parked.com I didn't see much difference in sedo or parked actually doing better with parked with better RPM and CTR. and I still got no reply from sedo about why they close my account and probably lost about 200 that I made there last month....