Imagine Dragons Tickets

Hi! I am trying to buy 2 concert tickets and decided to try from facebook groups. I've purchased other items before through facebook and have always used PaypalG&S to help protect myself from scams. Anyway I've found these groups where the admins state that they verify sellers and that purchases should be done through admins to prevent scams. However, I've spoke to a few admins and I've got this gut feeling that something isn't right. Can anyone confirm if these are actually scams or if I'm overthinling please? Some admins refused me paying Paypal G&S since "paypal holds the money for a few days". I have found an admin who has accepted me paying G&S but the price seems to be too low (unfortunately I can't know what the original price is only what the resale price is going for which is much higher).