About a year into working there (1972 or early 1973), we were told to start date-stamping the comics (a month in advance of after the arrival date). If we couldn't find the date-stamp (a common occurrence), we were told to write the date in the price block with a pen. This had nothing to do with the direct market (as it didn't exist yet). I was told that the distributor wanted their returns to occur within a window, between one and two months after the date of receipt. Before then, we could return anything that had sat on the shelf for over a month, no matter what date it was. The date-stamp was necessary because the cover dates of comics (unlike magazines) did not accurately reflect either the receipt date or the publication date. If I knew then what I know now, I would have negotiated with my boss just to sell them all to me for the return price. But like others have said above, as a youngster, I lacked the confidence to "make deals" or request favors.