We like "rares." Every player does. And we like to show them off. For this I define "rares" as items which are either no longer obtainable in game or which are very rare drops.
So, I would suggest that the development gods implement either of the following:
1) A "display case" as a piece of furniture in our houses/lairs (if and when furniture is implemented) where we can "deposit" items that other players can view (but not take) when they click on the case; or
2) A "museum" structure much like Libraries where players can deposit rare items (e.g. Boars Hide Masks, Vengeance Scales, etc.) that can be viewed by all players, but cannot be taken by anyone other than the owner.