I agree, here is how trade topic looks like atm:

there is a 1st post with a huge list of items. Im getting interested, I scroll a lot through useless "bump" entries and finally after a minute or two I find that items I wanted to buy are already sold.

This is now very ineffective, first post should always be the main and updated post.

Bump

This would end up being used for malicious purposed most likely. Sorry but I can't see this ever happening.