maybe it is just me but...
keep the chat bubbles the way they are just add a drop down option for additional information.
Example
S/T>View, Etc Etc (drop down option)
Willing to trade for Gx Gear blah Blah Blah
A/S prices are Etc Etc Blah blah
i know there is a forum page but not everyone is on that. This will also eliminate waiting for the person to log back on to see if they even have a good deal. Also it will also tell people what you are looking for so they don't waste their time.
maybe i just have a lot to say in my bubbles lol