Perhaps it might be a good idea to define "high quality" as applied to double guns and rifles.
Engraving and the amount of coverage is not necessarily an indicator of objective quality. At the risk of being tarred and feathered as un-American, I will say this, there are many highly engraved, "high grade" American guns that simply do not stack up against their English/German/Italian counterparts when viewed objectively. This is not meant to be an insult to anyone who likes American guns, it's simply the truth, and it's due to completely different philosophies regarding design and manufacture (and marketing). It also doesn't mean that I do not like American guns, in fact, the Fox gun is the only gun that I'll use as the basis for a custom project. English and European best-quality guns are simply designed, fit and finished to a level (both INSIDE and out) that American makers have never equalled (until today, CSMC's Boss-type O/U, for example). This is to say nothing of weight, balance and the subjective quality of handling. I don't believe that this is because American workers aren't able, but because American makers relied so heavily on automation in comparison to there counterparts "across the pond".
Also keep in mind that because of the collectors' market, the monetary value of many guns simply doesn't mesh with their inherent "quality". Things like rarity, special configurations, previous ownership by some long-dead magazine writer, etc. all conspire to drive values upward, irrespective of objective quality.