Add GearFocus and UsedPhotoPro to used camera resources#1

gear-focus-user wants to merge 1 commit intomaingear-focus-user/Photogrammetry-Guide:mainfrom

Just-adding-a-couple-more-resources-for-your-readers-looking-for-great-quality-used-camera-gear.-Thank-you!gear-focus-user/Photogrammetry-Guide:Just-adding-a-couple-more-resources-for-your-readers-looking-for-great-quality-used-camera-gear.-Thank-you!Copy head branch name to clipboard