Walmart offers the First Alert 0.94-Cubic Foot Combination Lock Waterproof Bolt-Down Fire Safe for $93.91 with free shipping. That's $4 under our mention from last month, $106 off, the lowest price we've seen. Buy Now Tips This safe claims to be the only safe that can be bolted to the floor and still remain waterproof and fire resistant with the warranty completely intact. Features measures approximately 18" x 15" x 20" Model: 2087F-BD