As an alternative, you could have one more field added to the stuff on the left (registered, location, eBay ID) - then when we find something on eBay, if the uid sounds familiar, we could check back here. I personally wouldn't look at that forum very often - I tend to have fairly specific interests (railway stuff!) so browse by catagory on eBay.
Also, don't forget there are a whole series of eBay sites - I assume most on here use eBay.com but I use ebay.co.uk, and there are other international varients too. We'd only really be interested in the ones from our country.
Sorry to knock your idea, but that's my 2p.
