Many different vegetables are considered to be the most expensive vegetables in the world, but there are some that can cost more than others. Some of the most expensive vegetables include:u003cbru003eu003cbru003e-A potato at $100u003cbru003e-A cucumber at $170u003cbru003e-Pumpkin seeds at $190u003cbru003e-Carrots at $200 and more.u003cbru003eu003cbru003eThe most expensive vegetable in a day's groceries may vary from person to person or even country to country.