Moved my 980# Liberty with a few buddies. Here's what I did:
Bought 2 1000# furniture dolley's from Harbor Freight for $15 each. Put cardboard on the side of the safe that will face down (I chose the side opposite the door hinges, so it couldn't come open and fall). Go around the safe with M/C ratchet straps to secure the dolleys to the side of the safe. Push it on it's side and wheel it out.
If it is on the first floor, do it yourself. They arent hard. Ive moved mine, and my dads both. His is 890 lbs, and mine is just under 1000lbs. A peice of cardboard and a couple blankets and you are good to go on carpet. On a hard floor use a furniture dolly (watch it on natural wood as it may leave indention marks on the floor.