I believe it could be done automatically as eBay has the API this is quite advanced now. Also, a lot of scrapper tools exist. I mean it should not be too difficult to figure out how to do that without going the whole nine yards. The forum plugin could check for a link to eBay auction and retrieve all necessary information. That would be useful as well for the the thread where we post interesting auctions, it would enhance it greatly, with all those pictures. Also, he plugin could normalize the eBay link and make it short and succinct.
The same plugin could be used for the price tracking system. So it's not really single-use after all.
The question as always is who will do it?
I don't think I have time for that, sorry.