How much would a eurasian kestrel cost?

im 13 and on my 14 birthday im going to begin my training for falconry. until im a "falcon master" as the call it, i can only own a kestrel or sparrow hawk. i am not going to buy one until a month or 2 after my training to get the hang of it. i would like to know how much one would cost. please let me know before september (my birthday).