Hi, I am new to the site, and would like to organise a trade. I am unsure how to 'select' the cards I would like to trade on another person's profile. Please can somone help to start me off or direct me to the section of the site that can? 
Thanks in advance!

Hello, 
 
So the easiest way is to go to the matching tab and click someone who has cards in the "has" and "wants" bubbles. Next, you'll want click on the set in which the cards are from and it should give you a drop down list where you can check the cards that you want to trade based on the cards that matched in your offers/requests. Do this for both your wants and offers and after you can write a note and submit the propsal to the other person.  
 
Hope this helps!