I successfully sold some of the silver from the safe online and reinvested a small amount into buying another unopened safe. I don't think I will find any treasures in this one (I was told by an expert that finding valuables in unopened safes that are sold is a very rare occurrence), but at least will have some fun in opening it. This one has a key and a combination lock. Luckily it comes with a key, which apparently can't be removed. It should arrive in the next few days.
The make seems to be Kingdom and a short search online indicates that they are manufactured in Australia. I will post some photos and more information as soon as the safe arrives.