I don't remember paying when i obtained mine in around 74.. If I remember correctly, i went too the local post office on base, filled out a form, name address, birthday etc. checked two boxes agreeing to abide by rules and sent it with a prepaid stamped postage card. About 30 days later l got my call sign in the mail. For the life of me, i can't remember that call sign.. Probably cause i never used it .. Back in that day, I don't think i would have wasted $20 for a license, considering that could have filled the tank in my 70 SS Chevelle 5 times.