Why not...I have a lot of autographed photo's that are from signings and are absolutely legit.
As soon as the artist passes the value increases because they will never sign another item.
Thing is I love them too much to sell them off...I have Petty, Lemmy, Johnny Winter and Leon Russell
all who recently passed, but they are not for sale...if none of my kids or grandkids want them
they will be sold off for a profit...the way of the world.