Hello, I'm a new member from central Pennsylvania...

[B. Dudley]

Thank you for sharing photos of your Parkers.

Each and every one of the guns have been heavily altered from their original conditions. All of the beavertail forends are non-original. The guns would have originally been splinter guns. One looks like it could have the original buttstock. The others are aftermarket replacements and are not Parker correct.
3 of the guns have had all their metalwork incorrectly blued and the other has had cyanide case coloring done which is one step closer, but still not correct.
The vent ribs on the couple guns are aftermarket and one of the barrel sets is sleeved, and not done all that cleanly.

Essentially the guns have more value as family heirlooms for you, but unfortunately carry very little value on the open market to anyone else.