The fact that there are large number of transactions and some information remains because the seller chooses to not remove the prices does not make anything "default." There is no "fact" only individual perception. Any residual information is a byproduct. There is no intent to make the Exchange a historical reference as I started before.
If there was any intent, the rules would be different. Giving the sellers a choice of how to conduct business is clearly more important than preserving selling prices that may or may not be accurate given the current secondary market.
We already have 2 outstanding Exchange mods and a solid staff of supermods to back them up. Volunteering to perform a task the owner of the site doesn't want done is like interviewing to be the next space shuttle pilot.