I've got an idea for an eve business where I offer a service to the eve community.
I am concerned that should I open the business with the wrong pricing structure, I will just get flamed out of existence with people saying "I would do that for you for X amount" or "that simply isn't worth the cost" or "Obviously you are useless at X, because your prices are so low"
Without giving away the nature of my idea, I thought STC might be able to give me some idea of the general prices of personal services in eve.
The service would involve actually playing the game (i.e. its not an offline service such as designing forum sigs)

Without giving away the nature of the idea there’s really no way to answer this. Either you need to flesh out your question or you will have to take a look at the compiled list of in-game services on EVE-O: http://www.eveonline.com/ingameboard.asp?a=topic&threadID=815331