One of the main ways that Mineseed players can make money is by selling things to the /shop. The shop includes several sections that outlines the items that can be purchased and sold. Unless you are very desperate (or Very Rich), you can likely find cheaper places to buy things by checking /warps or asking the Mineseed chat for recommendations.
To sell things to the shop, use /sg or /sellgui and put all the items in the menu. If it can be sold, it will sell. If it cannot, it will return it to your menu. You can also sell things directly from your inventory by doing /sell hand, which will not require you to open the /sg window.
Unless you are very desperate (or Very Rich), you can find cheaper places to buy things than from /shop!
