O-Castitatis-Lilium
Explorer
I would have to say that the price would be in the thousands. The cost to make it, the materials to build it, the cost to maintain it, the cost and materials it takes to transport people from one place to another, the distance of where you are traveling, what's being transported, ect. There are plenty of different factors that need to be taken into account when coming up with the price. I'm assuming you need to train someone in being able to not only cast the teleport spell, but also train the same person in knowing where all of these circles would be so that they can transport people properly, that's not a cheap job to do, especially if the city is using tax payer money to build it and set it up with no private funding of a generous wizard. They need to see and remember the place of where they are teleporting to right...I think, I don't remember to be honest; so they would need to send the circle attendant to every location to memorize these places, which again will cost money lol. So I would say in the thousands per use, but that's my opinion and my reasoning for it anyways.