The first thought I had would that it would be difficult to properly pack and ship some of the trophies, and there would be the risk of buyers remorse for all sorts of bogus reasons and the whole mess returned in tatters. I'd think consider the auction house route. Maybe, if he and his wife agree, donate them to a museum or other wildlife display in his or the family name, if they arrange for pick up. Hope your buddy does well and can focus on getting better.