Sellers maria_butterfly0152 and wide_savannah have been offering MJ signed items and drawings for some years now. To date, their offerings have been included in other threads eg the 'Michael Jackson Historic Drawings' thread, but it may be more helpful to have a dedicated thread, so I'm going back to some earlier items which I started noting from late 2014:
I like the look of this one. Likely authentic
No they are not authentic, this person is selling forgeries.
Don't like the look of this one. It looks fake.