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

It's not a laughing idea at all, given the fact that there is (a pretty unsorted) market demand and supply here.
But whoever is to run the main thread for it would have to know a lot of sensitive info, since you can't expect every claim to be just added to trade list before it is checked to be legit.
cheers
Exactly.
Dont make a website if you dont have the right information.
What's more, while it would be interesting to see what accounts are going for, account sales are generally frowned upon (see rule 18 of the rules post
https://bitcointalk.org/index.php?topic=703657.0). So people tend to want them to stay private. There was a time when, if someone saw that an account was bought, people would drop negative feedback on it just for that fact. I don't usually see this happen anymore though. Nevertheless, it's certain that the people who are doing the account trading don't want to be doing it in the light of day.