Looking for seasons to complete my collection

Hi there I’m in amor with The Oprah Winfrey Show and have slowly been collecting all of her seasons to watch them, I’m almost finished but I can’t seem to get ahold of seasons 1-4 as well as seasons 7 and 8. Is there anyone who might have them recorded on video cassettes? If so I’m very interested, I just want to convert them to dvd and I can even send it back as well as a dvd version when I am finished as well. Please let me know thank you so much for your help!