Escalera.

I have 2nd floor game room. The single flight of stairs is split in the middle with a landing, on which is a step up. Kind of makes things difficult.

I used an applicance dolly and 4 men to get Twilight Zone up the stairs (my first purchase). It only took one trial to convince me there's a better way.

With an Escalera, last month, I moved a Wizard of Oz up the stairs single-handedly. Mind you, I had to behead it because of the landing. With the head on, I've got to unstrap and re-strap it twice to make the U-Turn at the landing.

Any way, they're expensive but what price can you put on greatly reducing the risk of lifelong chronic back pain? What if your helper throws out his back? How about slipping and having your machine crash down the stairs?