It will depend entirely on the niche. I know a few accounts charging $30 on a account that has 1k-2k likes per pic but there are also some niches that charge $5 that has 5k likes per pic (due to crappy traffic).
But ask around your the people within your niche. It'll give you a better a idea what to charge if you don't want to tell us your niche.
What do you mean by Crappy Traffic? Im Getting 1.1k likes to 1.5k likes too in my 11k. page..
What do you mean by Crappy Traffic? Im Getting 1.1k likes to 1.5k likes too in my 11k. page..
http://www.shoutgr.am/
http://www.mediaphantom.com/
http://buysellshoutouts.com/