A 'search' function would be fine - if it allows for partial searches, such as "bat" for not only items from "batlab", but also for textures for "batlab" clothing from other merchants.
Even better would be, to be able to additionally specify the type of item you are searching for - such as textures, character or clothing items.

As long as Poser - or DAZ Studio for that matter - does not have a searchable repository for objects, there is a real need for something else. The purchase history - for now - is the only way to get this information