I remember looking for this info myself maybe a year ago and the best price I could find was $5000 a month on a less than optimal satellite. What I understand now is that the advertised price probably didn't include any uplink services and required some kind of extended contract.
So be prepared to pay what SatelliteAV quoted above if you want to be on the most popular FTA satellite. There are a few companies who jam a lot of channels onto one transponder so if you can accept a lower quality picture I'll bet they will give you a deal below $15000.