Firearms: Keep them unloaded, stored securely, and handled through a compliant process. For certain regulated items (NFA items), heirs typically must wait for ATF approval before taking possession, and an executor may need to file an ATF Form 5 for transfer to a lawful heir. (This is a federal compliance area; get qualified guidance.)
Precious metals & coins: Separate, document, and photograph. Values vary dramatically by purity, rarity, and condition.
Vehicles: Titles, keys, and VIN photos matter. Plan for a specialist channel (private sale, auction, or consignment) rather than letting it become an afterthought.
Personal data: Shred old tax files, secure passports, social security cards, checkbooks, and any sensitive paperwork before public-facing selling begins.