This crossed my mind a while back, as well as 'syndicates' similar to the Melbourne one that was active a while ago, where local members would try to acquire TFs for each other.

One of the biggest hurdles would be stopping rank 5 members and below posting in the sighting section once they learn of it, say, through TFW2005's Aussie sightings, or seeing it themselves.

I'm in favor of the member sightings section mostly to stop scalpers though.