Union Armera was a precursor company to Grulla. Grulla is one of the most highly respected Spanish makers today.
If it was a modern Grulla, $1000 each would be giving them away. Those built in the Union Armera era (stutter intended), tended to be lower grades. They were sold into the North American market at highly competitive prices, so corners were cut in final fit and finish.
But, Union Armera is no different than any other maker - you can't draw any conclusions about the gun from the maker, you must look at the individual gun. Your photos don't show much or much detail, so it's hard to evaluate those specific guns.