Wow, that is a fair old slab of cash...on top of which, three-figure prices in $AUS tend to foreshadow hefty shipping/customs fees from a UK point of view. Not that it isn't entirely justified for such a work of art.
I went to two or three UK Games Days around the turn of the millennium, then a last one for a Conclave meet in...maybe 2005? That time was well after Inquisitor had been released, though I'm not sure about the others. Still, if that is an Australian Archivist then maybe my memory is playing tricks and it's just very similar to the one I saw, although looking at the picture it does seem extremely familiar.
Incidentally, one of the pictures has an astonishingly good 54mm Thousand Sons sorcerer I had never seen before. I attempted one of those myself once, just to see if I could pull it off, and frankly if mine had ever been in the same room as that masterpiece it probably would have caught fire from the shame!