I have a LOL idea
why some one not open a "exchanger" for Bitcointalk ACC in Excel and we can see open order, high rate low rate

no, that's not a LOL idea, but there is some sensitive info that may must be hidden to the buyer...,
and about supply and demand...,
I actually thought of this idea before. However.. I'm not a trusted person (only completed three deals on Bitcointalk). To open a exchange for Bitcointalk accounts, we need someone who can be trusted like QuickSeller or devthedev.