Hi Stewart, thanks for the email regarding the club.
John Knibbs sells these restored for the same price (£500), I personally don't like to see them be reblued etc, but each to his own.
A Model "H" in good working oder with it's proper open sights about £140 - £180 sold privately.
So in mint condition but restored as new £270 would seem about right, but if it was mint condition but unrestored, it may be worth a lot more to the right buyer.
I sold one last year in nice original condition for about £160 IIRC.
£500 IMO is far too much.
HTH
Ben