On one hand yeah, cool , convenient.. on the other.. I can see myself accidentally checking something I do not want to trade in and only realizing it's gone when I go to do something with it.
I guess you could stick it in your armory chest or quadruple check before you hit "OK"... but.. that's my only reservation. Little too easy to accidentally GCC things away. I'm not sure how much time this would save those who need to go back over the list 20 times to make sure things aren't checked incorrectly... .. I may have slight hoarding anxiety.