Ah ok that makes more sense
Tooltips like you see on items in your inventory are standard behavior provided by SOE, not something modded in.
Unfortunately, if SOE isn't already providing a tooltip, its unlikely we can grab the data needed to show it in the market window. There's a very slim possibility the info is there, just not being shown by default, in which case it might be possible to switch it on. I'll have a look see when I'm done with my updates
