Walmart offers the Armorguard 18-Gun Fire Resistant Convertible Safe with Electronic Lock for $385.99. Opt for in-store pickup to dodge the $49.97 shipping charge. That's $590 off and the lowest price we could find. It's fire-resistant for up to 30 minutes and 1,400° Fahrenheit, and features a 2-way locking, drill-resistant hardened steel plate, three adjustable shelves, and two compartments.