Tall Cacti Terrarium

Open terrariums are low maintenance and perfect for someone who is worried they might kill the plant. 
In this open terrarium there is a healthy cacti. They only require water once a month in winter and fortnightly in summer. They like being in a bright place but not in direct sunlight. 
Due to the disign, I would prefer buyer to pick up or meet by arrangement. But at buyer cost and risk could post.