Walmart.com has the Honeywell 2.1 Cu Ft Fire/Waterproof Digital Safe for $230. It weighs 138 lbs, so Walmart charges $43 shipping. You can have it shipped to store for free, but be prepared to load it into your car.

Programmable Digital Lock with Backlight and Protective Cover

Handy Hauler Handle and Wheels for Consumer Transporting Conv

Waterproof seal and pry resistant concealed hinges