Nice job Tom! Being that chip signing is in it's infancy, I guess you would call them "rare". Since I started just over a year ago, I've always asked if the celeb has autographed a chip before. 95% answered with a definitive "No", the other 5% said they don't think so, with the exception of George Carlin. (I didn't even ask Donald Trump, for I knew he has.) I've had numerous people look at the chip & ask what it was. Jimmy Connors looked at the $1 Sands chip on Thur. & asked what it was he was signing. John McEnroe didn't but admitted it was the first he signed. I would venture to say the value of the signed chip would be the same value, or a little less, as anything else that particular person has signed, with the exception being their own commemorative chip with their pic on it. I think Gene could shed a little more light on this. He has been in the autograph business for probably 45 years.