I'd better amplify my comment about 'appropriateness' for collecting: the AWM like most museums, has a space problem: they simply cannot collect everything, so by necessity have to be selective. As a result, there is an 'importance' level associated with an item during the deliberation process. High importance/well provenance items the Memorial will usually find space for - a VC, for example, is a sure thing, while several shelf metres of training pams with no provenance and little association with objects already in the collection would attract a very, very low priority for collection.
Space costs money, care and preservation for the long term cost money, and both have finite limits, so curators (and their managers!) are always careful to weigh up all the factors before accepting - or rejecting - an offer of an item. It was how it worked when I was there, and I suspect not much has changed in that regard.
Mike C