I went to this late today after a friend rang me around 8:30am and told me it was on. I got there round 10am, so I missed out on the really good stuff. I did pick up a few good bits though:

HT-HQ GTS350 manual bellhousing (11" clutch style).

NOS HK LH tail-light lens.

NOS HJ headlight harness (firewall plug forward) for Belmont, Holden, Kingswood, GTS (inc Sandman).

Mint HZ quad headlight harness for HZ with QH lights (GTS, Premier, Statesman, Ambulance and later Sandman).

I missed out on a genuine HZ Sandman 10-bolt 3.36:1 diff assembly for $80 by 10 minutes.