For example, If you decide to set the price at 7 medals each part, every S weapon/armor would cost 238 medals (34 parts needed) each.. jewelrys would cost twice.
Maybe 7 medals each piece is too much or maybe not.. there is to consider the difficulty with which you can collect medals.
I play here since first days of February if I dont remember wrong and I spent 60/70 medals for Cp pots and Elixirs.. now I have less than 500 medals.
This means that in less than 50 days, I have not even managed to accumulate 600 medals.
Of course this is my personal experience, just to give an example.. surely many others will have done more Raid boss and accumulated more medals.