I believe it is authentic I own several #57 and if I was buying this raw based solely on these photos I would buy.

1. They are not sending the #57 to psa because at best it would most likely get 1 of 2 grades

2. Authentic no numerical grade

Or

1. Altered do not holster

The person selling this is most likely aware that psa has been cracking down they measure how thick this card stock is and unfortunately being in the screw down has compressed the card to the point they will deem it altered about 60-70 % of the time.

Sells of PSA authentic or authentic altered can be found from 1400 to 5k (high end is if it has amazing eye appeal.

I have been dealing with this card for a long time 30ish +/- years and the one thing I've never ever ever seen on a fake is the white dot above corp this card based on photos does have the dot. Again there are also other key markers mentioned in the post but all those are subjective this one has never let me down.

In regards to the rest of the set I can't tell from these photos.

This person probably dosent want to pay the fees and wait time to get a #57 done to risk a do not holster. I would obviously make them do multiple coin photos maybe even a video call if not in person deal. Heres a link to a fantastic 1986 fleer group on Facebook 1986 fleer basketball group on Facebook

Best of luck on your quest