Whether or not the parents placed or were ever in shows is not a determiner of whether these birds are quality of not. One of my poorer looking partridge cocks produces better looking offspring--much better than those fathered by my better quality cocks. Likewise, even excellent quality parents produce some offspring who are not.
As was said, an up-close and hands-on look would give a better idea of all their features.
As was said, an up-close and hands-on look would give a better idea of all their features.