Posted By:
steve k<<< I have cut up a 1957, 1960 and a 1962 Topps sheet. My profit from these cards was 5 fold from the orginal price that I paid for the sheets. >>>
You got very lucky in this regard.
Most if not virtually all uncut sheets this old have surface wear, marks, indentations, creases, etc., on all the cards to some degree. Even if the cards were "properly" cut from the sheet and even with the now razor sharp corners, with the surface wear these cards should not be given a high grade. PSA will not even grade these cards. So from both a collector and value viewpoint, keep the cards uncut.