Walmart offers the Stalwart Electronic Extra Large Safe in Black for $69.99 with free shipping. That's tied with last week's mention, $43 off list, and the lowest price we could find. It measures about 20" x 12" x 14" and features a digital lock with two manual override keys and a LED display. Four AA batteries are included.
WD-40 is handy in a lot more situations than you likely realize.