I'm not involved in autographs, but my personal rule I learned years back about other areas I deal with was only give an opinion if asked for one (a post for an opinion on a this board can count). I'm happy to help out collectors who have some questions but offering unsolicited opinions can lead to trouble and/or a waste of your energy. The second is give your honest opinion and that's it-- some people won't accept the facts you give them, especially when potential for resale money is involved involved, so don't worry about.
But there are many honest collectors and sellers with sincere questions about date, identity and authenticity, so I don't have an issue with people asking me for my opinions . . . If answering email questions becomes a part time job I'll quit, but two a month I can handle
