gunnertwo is correct.
The first and third photo are of a Stoeger .22. They came in two variations: aluminum barrel extension and steel extensions, smooth grip and checkered grips. I own both and they have been reliable and accurate plinkers. You can't beat the Luger design/profile for a naturally point and shoot pistol. You can probably check GB for what the current selling prices are going for. I've had mine since the late seventies so I can't comment on pricing.
You need to provide more information on the second photo for pricing....manufacturer, year, matching numbers and so on.
Mark