I am not sure about that seller. Although they have some authentic stuff on their site, they also have had some ttm and secretarial stuff on there. If I go on just a comparison, this autograph does look to be authentic, but the reputation of the seller worries me a little bit.
If I can direct you to another good legit seller, try this seller on ebay: gridironlegends 100% authentic stuff. And they are cheaper too. ;)

http://shop.ebay.com/merchant/gridironlegends?_nkw=kareem+abdul+jabbar&_sacat=0&_trksid=p3911.m270.l1312&_odkw=&_osacat=0

http://www.fanmail.biz/mboard/viewtopic.php?t=60539

;-)

It look's close but i would go more twords forged. {down}

http://www.toppixautographs.com/kaab-losanla.html

I want one for my Bruce Lee collection :lol: [ugotmail]