Hey mate, no
Just doing a sale trade thread agreement but have never had to do it before and I can never find where to click to set up a deal with someone.
Go to the home page mate then click on 'submit sale & trade agreements'. It's right in the middle of the screen shot below, just above the basketball cards section. Just the type the trade you want then copy the web address and paste it in a Pm to the person you want to trade with.