Actually no I think $9/month is appropriate. A heroku dyno is about $35 a month, and you have a full on solid highly supported service. Here you pay $9/month + server fees which say with the micro instances comes out to about $14 bucks a month. So by doing it on my own EC2 with this service a small instance comes out to about $24.

Only thing is though, here you have the option of choosing a larger instance type and by percentage the charge may be to low. To combat that I suggest a more tiered pricing.