My friend is interested in I Love Lucy for a research projectand came across two photos of Shirley Mitchell. The JSA one is listed at $120 or best offer while the other has a starting bid at $34. We aren't sure if the signature is real or fake.
I can't speak to this but seller has Paul Henreid for $44. Butterfly McQueen for $39 as well. I would advise caution. I also am against stickers but YMMV.
"Your mileage may vary" = some collectors want those stickers (PSA, BAS, JSA, ACOA) and some prefer them on the back. Others prefer them on the certificate, some don't want any sticker at all.
I believe the JSA one is fine. I'd be hesitant about the other. She did live a very long life and was apparently good in signing. Primary collectibility for most due to the Lucy connection.