Signed SI Covers and Photos

[powderfinger]

I posted this in another thread but want to post stand-alone as well. I have a small box of SI covers and 8x10 photos that belonged to a friend who recently passed away. There are several big name athletes among the pieces, and all will be for sale once I can determine if they are legitimate. Some of them are big fee certification items, and if anybody has the expertise to identify the legitimacy of these autographs, I could use your help before wasting money on a TPA. Here's a sample of what I have. I can send photos of others if you're able to help. I've posted the covers but also have 8x10s of Butkus, Willie Mays, Jim Brown, etc. I've already been told the Gretzky autos were good, just rushed, but another opinion would be appreciated. Thanks for looking (and hopefully helping).