Junior football boots (Arleston TF1)

My son has decided that he wants to join a junior football team this year. Went to training this morning, and the coach has said that he needs some football boots for games during the season. After looking up the cost of a brand new pair, I am looking for a pair that perhaps someone doesn't wear/use anymore, that your son or daughter has grown out of. Anything over junior size 9 would be great. Thanks