Walmart offers the First Alert Combination Lock Waterproof Bolt-Down Fire Safe for $99 with free shipping. That’s the second lowest price we’ve seen, although we saw it for $21 less in January. (It’s the best price we could find today by $22, outside of the mention below.) This safe claims to be the only safe that can be bolted to the floor and remain waterproof and fire resistant with the warranty completely intact. It measures approximately 18″ x 15″ x 20″.
A close price: Mill’s Fleet Farm has it for $104.99 with in-store pickup.