The Market is the place where companies can buy raw materials and players can buy finished products. As of Day 330 (Pre-Reset), Houses, Hospitals, and Defense systems are purchased through the Estate page.
To access it go to Market -> Marketplace.
There you can choose what you want to buy and in what quality. You can buy only in the market of the country where are you located. Keep in mind that there are 25 inventory slots, and nothing can be purchased if they are full.
Color
Meaning
Black
Market of The country, Choose the country you want to buy the products.[1]