It might help, cause when someone write something in a Yahoo thread we all receive an email about it. So we all know almost at the same time that player X is available.
Or you could at least write a message to remind people that there is a trade block in Yahoo and that they should use it.
It would also be nice if people write some text in the box when making an offer or rejecting an offer. I use offers as a chat (and I know I'm not the only one) so most of the time the offer I send is crap, the important thing is the message under. Often asking if player X is available and what the owner wants in return and what I can/want to offer, so if you don't want to trade the guy just say it please instead of just hitting the red reject button.
Thanks.