H&H made their hammerless Rook rifles in the "Ross" grade and the "Royal" grade.
They shared the same action but the Royal was engraved to a higher standard and the stock of the Royal had a cheekpiece with generally better wood from what I have observed.
In my opinion, the asking price is more in line with a really nice original Ross model and maybe about right as a lined Royal, again in otherwise great condition.
Many of these rooks have horrible bores so it is not unusual to find them lined to more modern chamberings many of which are way more versatile than the original rook specs.