Well, I suppose the idea behind this is to reduce the spam or not having to yell "S> torch".

But if you think it trough, would it really reduce spam? People would keep spamming "Selling stuff, check my profile!", which is even worse, because you have'd have to check each guy individually to see what he's selling.

And the most frustrating thing about this would be, if someone had an item listed you'd want to buy, and that guy would be afk...

And lastly, I think this feature would mostly be used for showing off items and not actually selling them.

If you don't like "street merching" as it is now, I suggest you use the cs.