Thanks for this thread. As a new user on this site, I found the FAQ page to be very helpful. Each trading site has its own nuances, and it's always nice to have a good outline of how things work.
So far, it has been great finding new trade partners!
One thing I think would be really helpful for facilitating trades is a more advanced way of searching the database. For example, it would be really useful to be able to match users who have cards on my want list (in bulk rather than limiting to certain sets/players/etc) AND simultaneously who have needs from my FS/FT list rather than trying to search using one parameter at a time.