Step 1: Finding the Item you want to buy
Directly searching
To find the items you want to buy, you can either search for them using the main search bar at the top of the page:
Browsing by category
Or you can alternatively search for items, by looking through the different banking categories, as seen in the picture below (excluding CS:GO and TF2 Item Selling):
After arriving on the category page, you can either directly pick the bot you want to buy items from (skip to step 3) or scroll through the item list, until you find a item you want to buy:
Step 2: Selecting a Bot
After arriving on the item page, you can decide which bot to buy the item from. On some weapons you also have the choice to buy a Killstreak variant:
Step 3: Checking out
You should have arrived on the bot inventory page by now. Select the items you want to buy and then press "Checkout using items/pure" to initiate the trading process:
After initiating the trading process, you will receive a tradeoffer, which should be accepted in a timely manner.