I rented a piano moving rig for my safe, of similar weight. It has ratchet straps that go around the safe, then each corner has a lengthy solid hardwood handle (hinged), that allows 2 people to get purchase on.

6 people, my safe was a piece of cake. Just over 100lbs per person. Could have done most of the move with 2 people, except for the stairs.
Cost me $50 for the piano rig, and another $25 for a case of beer for myself and my buds. Note - beer stayed in the fridge until the safe was in place...

Here's a video...