No engraving is a choice, not proof of a lower grade or an indication of personal use. Some prefer their guns less adorned, and some of the finest guns ever made have little or no engraving, if the client wished it. Yes, some cost is saved, but sometimes less engraving shows off other aspects of the gun even better. I wouldn't be put off by a 'plain' gun, if, as Canvasback says, the quality is there. And little or no engraving is much better than bad engraving.
Here is a very plain Belgian double, but the essential quality is there. Its simple attributes contributed to its low selling price, less than a trip to the supermarket these days. Better still, the lack of embellishment meant no one snapped it up before I did.