If it's for your personal collection, I'm all for getting a base card signed IP. I only have 2 AU'd cards in my collection that aren't certified/authenticated by a manufacturer or re-seller. Both are of Torry Holt (now-retired NFL WR) and I watched him sign both of them. It was a week after the STL Rams won the Super Bowl in January 2000. Since he was a rookie in 1999, I only had base set RC cards. I got him to sign one card of him in a Rams practice uniform and one card of him playing in a game for NC State University. I still have both cards, plus the newspaper article that mentioned that he was signing for free in his hometown (where I lived at the time). I have one other IP AU that isn't certified/authenticated, but it's on an 8x10 photo. Oddly, it's another WR from that Rams championship team. I found out that Ricky Proehl was doing a signing in another small town near me a few years after that. He was playing for the Carolina Panthers then and I didn't have any cards of him in a Panthers uniform yet. So I bought a photo of him in a Panthers uniform at the signing and got him to sign that. When I got home, I framed it and stuck the receipt inside the frame (the signing wasn't free and the picture was part of the receipt). It was totally worth the $23 I spent! I talked to him for a couple of minutes, got a picture of him with my sister, and I got to hold his Super Bowl 35 Championship ring from 2000 AND his NFC Championship ring from the 2003 Panthers. It was amazing and I'll never forget it. I was planning to get a signature of Sam Mills the day before that, but sadly, he lost his battle with cancer 5 days before the signing. He was the first person in the Panthers "Ring of Honor", has a statue of him outside of the stadium, and is where the Panthers mantra of "Keep Pounding" originated.
Oh, there is one more IP AU, but it's not a player. I was at Bank of America Stadium for a Panthers/Steelers game years ago. After the game, I went to the Team Store to buy some stuff. Then I saw "Catman" in there. He is the Panthers Superfan that got inducted into the Hall of Fame back in 2004 when the NFL picked a Superfan for each team and inducted them into the HOF. I got a picture with him and had him sign my game program (which he signed "Catman HOF 2004!" and with whiskers on each side of Catman). I took the program and the photo and framed them, with a backdrop of Panthers Blue with type on it noting when they were acquired.
NO PWE's EVER!!! PLZ PM me 1st before sending any offer. ONLY selling cards as of March 2024. No trades or purchases right now.
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Largest total PC card collections by Team, then Athlete (as of 3/22/24):
STL Cardinals (MLB) - 8810; Carolina Panthers - 2888; GB Packers - 1790+ cards
Mark Martin (NASCAR) - 2038 cards; Jimmie Johnson (NASCAR) - 1875 cards; Jeff Gordon (NASCAR) - 1594; Ricky Rudd (NASCAR) - 839; Ozzie Smith (MLB) - 707