One of the dealers at the Big Reno Gun Show this last week had 8 or 10 of them on his table priced at $550 each. A couple had the very rear sight in your posted link. Not certain about the others.

Hi there only new here but have had a bit to do with these here in Aus. Bull barrel and body are all one piece. Action was made by someone else, greener I think and supplied to vickers for asm. Uses a one piece stock. Have only ever seen 22lr but apparently there are a few centre fires kicking about. Very accurate due to rigidity. One of our local stock makers has just finished refurbishing one. I had the opportunity to handle it at the smiths when he picked it up. His custom BR stock looked the goods. Had it fitted with a t24 weaver. From all reports it shoots better than it looks (if that is even possible)