If he is using funds from a linked bank account, he should be able to have brother in law deliver cash.
I got burned years back on a Star Wars video arcade upright I sold via eBay (20yrs ago). Shipped it to Oregon or somewhere via Forward Air. Buyer reported to PayPal that it wasn't working when he received it. PayPal reversed $750 out of my account... PayPal chargebacks can suck.