Media Nexus is one of the good CPM ad network for low traffic sites. The network Does not accept any international traffic and the eCPM rates are very very low. the network needs atleast 50% US traffic in order to monetize from site.
NET 7 terms and NET 30
Average US CPM rates
$ 0.45- $0.49
Average International CPM rates
$ 0.01- $0.02