I've moved SB 9" all by myself with no problem. If you use any lifting straps/device to move it, only loop around the webs inside the bed. NEVER allow a loop to even TOUCH the leadscrew, carriage, QCGB or headstock. When lifting, your strap should be as close to the headstock as possible (there is a web there). Use the carriage position to balance the lift.
Just remember that 98% of the weight is cast iron. If stress is put on CI, it will break, not bend.
Remove as much as you can before you move, such as tailstock, gear cover and most gears. If you find it still too heavy, you can even remove the headstock, too.