On the Upgrades page in the Your Inventory section, select the item you want to upgrade or switch to the balance game mode and set the desired amount for the game. In the Items section, select the desired item and press the UPGRADE button
Add a minimum of 3 of any item to the contract.The price range of the item you will get will be shown afterwards.Click on the Create a Contract button and wait for the contract creation to complete.You can use the received item in any mode on the site or take it to your Steam inventory