Sometimes eBay auctions are the only recent price guidance for scarce Tolkien items. I personally try to keep a list of items I haven't seen in a while, so I have some idea what people are willing to pay. Would it be useful to have this kind of database available publically? It could take a lot of storage down the line, so it might require ad support or possibly a small subscription fee (after people have used it for a while and see if it is worthwhile.)