Misc: which is the most photographed and climbed mountain?

Questions

the lever, the _____, the inclined plane, the screw, and the wheel and axle?

the lever, the pulley, the _________, the screw, and the wheel and axle?

the lever, the pulley, the inclined plane, the _____, and the wheel and axle?

the lever, the pulley, the inclined plane, the screw, and the__________?

There are hefty pricetags on some Internet domain names. The highest-selling domain name to date, business.com, went for ________ in 1999?