Hey nzminer, I recognise you from the megacoin threads. At the moment a masternode returns about 1.94 Dash every 6-8 days. You have to obviously pay for your hosting costs though.

I use www.node40.com to host mine and I think that they charge around 2 Dash per month for your hosting fees. So with them you would earn approximately 6.3 Dash per month ($59 U.S).