Sometimes I get this wrong, but, I seem to recall this gun as having had a major problem that was repaired, leaving it not quite GT’s gun. Barrels? Sleeved? Restock?
I can’t remember. But, if it is anything I listed, above, especially sleeving, it isn’t worth the price being asked now, much less what was being asked, before.
Gough Thomas ordered this gun late in life, and, as he clearly explained, it was intended to be his last gun, and featured many compromises that would help to keep an old man (that he planned on being someday) in the game, so to speak. The length of the tubes and the weight of the gun, being the most obvious of those.

Nice gun. But, it was his nice gun.

Best,
Ted