Jesse,
Your Parker looks to have been well cared for and used as there is little checkering left. With that in mind doing anything to the gun other than cleaning will detract from the value rather than increase it. I have one that the barrels were cut and blued and messed up screws that I paid $350 for. Depending on how the floor plate screws look I would think the value would be between $700 and $1,000. I do not have my ear to the ground on current values however and some others will surly correct me. I do shoot mine.
Harry
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