Does state farm issue a policy for used drones ? or only new . I have State farm PAP on my Mavic 2 Pro but my son is looking at a used one and my Insurance agent office is closed today.

Hello and Good day Kingram. Thank you for reaching out. I hope you'll get the best answer and recommendation here from our valued DJI Members and customers. Have a safe and happy flying always.

It's just like a used camera or rifle, I can't see why they wouldn't insure it.  You pay for the amount you tell them it is worth.  No receipts are necessary.

As long as you have the receipt they will cover it. A bill of sale may work but can't say for certain.