Even if he is legit, how do we know the signature is real ?
you dont, lots of 'sig' sellers on ebay and similar markets can easily fake signatures grabbed off the internet (its not hard to photoshop a ink - looking signature and slap it onto a photo) and sell them for hundreds of dollars, and dont be fooled by 'certificates of authenticity' either, those mean nothing and can easily be mass produced from a template. do not ever take anything short of video proof of the signature being signed as sufficient proof that the signature is authentic.