We do have plans to update quite a few auction things, such as the giving of information about wins to the winners and those who sell the items. This information about a specific item is also something we'd like to do, it would allow for people to follow standard pricing set by players.
It will be added in the near future, for now you'll have to look for an existing auction and check for pricing on those, if there aren't any ask in-game; many people are wise to the good pricing of most items.
To clarify this is something we will be doing.