I think that is a reasonable price, if the barrels are in good condition, not a very sort after rifle or caliber & the market is a little soft for doubles right now (I think going to get softer to), I think this has a even less common bore diameter then the standard .475 No2 ?
What does it handle like, as all the .475 No2 I have handled were very heavy & not finely balanced, one had a huge action that I'm sure would handle a .600NE ?
Not being rude, but most English made doubles have a much more lively feel in the hand.
The Merkel is not a rifle to compare the handling or feel of either, not compared to a early Westley Richards - Rigby or H&H