Pick a price you think is right. (It is random sometimes. Intel said how about $80 for the 8080 chip). get feedback. Sometimes raising the price increases market share ie... wine. For a web service there are no cost of goods or product costs to use as a basis and then add 100% margin. Unless you are going to turn off all your potential customers at once, which is unlikely, just do it and iterate.seems like it would be easier to lower price than raise it.